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IKUTA Akihiko

    Department of Mechanical Engineering　Professor
Last Updated :2024/04/13

Researcher Information

Degree

  • Engineering Doctor（Hiroshima University）
  • Engineering Master（University of the Ryukyus）

URL

Research funding number

  • 70330321

J-Global ID

Research Interests

  • 工具   摩擦攪拌   凝着   セラミックス   難削材   切削加工   Adhesion   Ceramics   Difficult-to-machine materials   Machining   

Research Areas

  • Nanotechnology/Materials / Material fabrication and microstructure control
  • Manufacturing technology (mechanical, electrical/electronic, chemical engineering) / Manufacturing and production engineering

Academic & Professional Experience

  • 2017 - Today  Kindai UniversityFaculty of Engineering教授
  • 2007 - 2017  Kindai UniversityFaculty of Engineering准教授
  • 2009 - 2010  University of Toronto特別研究員
  • 2002 - 2007  Kindai UniversityFaculty of Engineering講師
  • 2002 - 2007  Assistant Professor,School of Engineering, Kinki University
  • 2007  - Associate Professor,School of Engineering, Kinki University
  • 2000 - 2002  Kindai UniversityFaculty of Engineering助手
  • 2000 - 2002  Research Associate,School of Engineering, Kinki University

Education

  • 1997/04 - 2000/03  Hiroshima University  Graduate School of Engineering  材料工学専攻
  •        - 2000  Hiroshima University  Graduate School, Division of Engineering
  • 1992/04 - 1994/03  University of the Ryukyus  工学研究科  機械工学専攻
  • 1988/04 - 1992/03  University of the Ryukyus  Faculty of Engineering  機械工学科
  •        - 1992  University of the Ryukyus  Faculty of Engineering

Association Memberships

  • THE IRON AND STEEL INSTITUTE OF JAPAN   日本鋳造工学会   日本機械学会   精密工学会   溶接学会   Japan Foundry Engineering Society   The Japan Society of Mechanical Engineering   The Japan Society for Precision Engineering   Japan Welding Society   

Published Papers

  • 摩擦攪拌接合ツール
    生田明彦
    科学と工業 97 (6) 166 - 171 2023/06 [Invited]
  • 切削工具を応用した摩擦攪拌点接合ツールの塑性流動状態の解明
    生田明彦
    公益財団法人天田財団FORM TECH REVIEW 31 39 - 43 2023/05 [Invited]
  • 鉄鋼材料用接合ツール形状による攪拌領域温度の検証
    生田明彦
    2021年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 85 - 86 2022/07
  • Influence of material adhered to welding tool in consideration of shape of cutting tools on friction stir spot welds
    Akihiko Ikuta
    Welding International 36 (1) 53 - 64 2022/02
  • Influence of Material Adhered to Tool in Consideration of Cutting Tools on Friction Stir Spot Welds
    Akihiko IKUTA
    溶接学会論文集 39 (3) 190 - 199 2021/10 [Refereed]
     
    This paper investigates the influence of the presence or absence of material adhered to the tool in A5052/A6061 lap joints when friction stir spot welding tools with cutting edges and rake angles similar to a cutting tool are used. This study focused on the inflection of material flows by the behavior of the material adhered to the tool during the friction stir spot welding. The failure load of friction stir spot lap joints made using tools with adhered material was more than 1.5 times higher than those made using tools without adhered material in some welding conditions. At this time, it was clear that the ability of the tool to discharge chips did not change irrespective of whether or not there was adhered material. In addition, the material flows during friction stir spot welding, with or without adhered material, were the material flow made by the chips in the keyhole edge and the material flow made by the cutting edge of the tip of the probe in the keyhole corner. However, when tools with adhered material were used, the material flow in the keyhole corner produced not only a flow of welding material but also a flow of adhered material stirred inside the welding material. From the results, when these tools with adhered material are used, it is clear that the adhered material assists the flows inside of the welding material, and can improve the characteristics of friction stir spot welds.
  • 鉄鋼材料用接合ツール形状が接合温度におよぼす影響
    生田明彦
    2020年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 87 - 88 2021/07
  • Characteristics of material flow in friction stir spot welding tools in consideration of cutting tools
    Akihiko Ikuta
    Welding International 33 (7-9) 281 - 291 2021/03
  • Characteristics of friction stir spot welding tools in consideration of cutting tools
    Akihiko Ikuta; Thomas H. North
    Welding International 33 (4-6) 200 - 210 2021/02 [Refereed]
  • 摩擦攪拌接合に関する研究動向
    生田明彦
    日本塑性加工学会誌 3 (34) 617 - 620 2020/10 [Invited]
  • 鉄鋼材料用接合ツール形状の各種ツール材料に対する適用性の実証
    生田明彦
    2019年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 98 - 99 2020/08
  • Characteristics of Material Flow in Friction Stir Spot Welding Tools in Consideration of Cutting Tools
    Akihiko IKUTA
    溶接学会論文集 38 (3) 125 - 133 2020/07 [Refereed]
     
    This paper investigates the material flows in A5052/A6061 lap joints when friction stir spot welding tools with cutting edges and rake angles similar to a cutting tool are used. In this study, several kinds of modelling experiment were used to visualize the material flows during the friction stir spot welding. The majority of the material flows in A5052/A6061 lap joints was diagonally upward from the lower sheet, whether the rake angle of the probe with the cutting edge similar to a cutting tool was negative or positive. When the tool shoulder failed to contact the upper sheet surface, the stirring ability of the probe alone was to an extent high with a negative rake angle and very low with a rake angle of 0° and with positive rake angles. However, when the tool shoulder came into contact with the upper sheet surface and the chips generated by the probe were clogged, the stirring abilities of the tool with a rake angle of 0° and with positive rake angles were very high. In addition, in the tool with a rake angle of 0° and with positive rake angles where the discharge of chips was smooth, the lower sheet material moved upward as the chips were stirred and produced new material flows. From these results, when these tools are used, it is suggested that the generation, the discharge and the stirring of chips affect the material flow upwards, which is crucial, and also downwards, in A5052/A6061 friction stir spot lap joints.
  • 生田 明彦; Gerlich Adrian; 旗手 稔; 信木 関
    鋳造工学 全国講演大会講演概要集 公益社団法人 日本鋳造工学会 176 193 - 195 1880-5388 2020
  • 生田 明彦; Gerlich Adrian; 旗手 稔; 信木 関
    鋳造工学 全国講演大会講演概要集 公益社団法人 日本鋳造工学会 176 196 - 197 1880-5388 2020
  • Characteristics of Friction Stir Spot Welding Tools in Consideration of Cutting Tools
    Akihiko IKUTA; Thomas H. North
    Welding International 37 (4) 224 - 231 2019/12 [Refereed]
     
    This paper investigates the mechanical characteristics during friction stir spot welding when cutting tools are used with consideration made to tool shapes. Friction stir spot welding tools with cutting edges similar to a cutting tool were used in this study, and the rake angles of the tools were changed from negative to positive. The failure load in the tensile shear test of an A5052/A6061 friction stir spot lap joint made at a tool rotational speed of 1500 rpm was the highest when using a tool with a negative rake angle, and was almost the same when using tools with rake angles of 0º and positive angles. The thrust force and torque were similar to the results of the tensile shear test. These were the highest when using a tool with a negative rake angle, and were almost the same when using tools with rake angles of 0º and positive angles. These results indicate whether it is possible to easily generate and discharge chips during probe penetration. Regarding this, it seems that the rake angle of the tool significantly affects the generation and discharge of the chips. These results suggest that the mechanical characteristics during friction stir spot welding can be controlled by changing the tool geometry.
  • Change of material properties by casting and influences on machinability
    IKUTA Akihiko
    Journal of the Japan Society for Abrasive Technology 63 (9) 2 - 5 2019/09 [Invited]
  • 鉄鋼材料用接合ツール形状の各種ツール材料に対する適用性の検討
    生田明彦
    2018年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 99 - 100 2019/08
  • Fundamental Study on Technological Method to Improve Tool Life on Friction Stir Welding by Tool Design
    IKUTA Akihiko
    Journal of the Japan Welding Society 88 (3) 22 - 27 2019/04 [Invited]
  • 鉄鋼材料への適用を考慮した接合ツール材料の検討
    生田明彦
    2017年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 81 - 82 2018/08
  • Cutting characteristics of duplex stainless cast steel X2CrNiMoN25-7-3
    HAGINO Masahiro; TAKEMURA Akihiro; FUJITA Tsuyoshi; USUKI Hiroshi; IKUTA Akihiko
    Journal of Mechanics Engineering and Automation 7 (6) 300 - 306 2018/01 [Refereed]
  • 鉄鋼材料への適用を考慮した接合ツール各部の評価
    生田明彦
    2016年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 91 - 92 2017/08
  • Akihiko Ikuta; Thomas H. North
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Japan Welding Society 35 (4) 171 - 178 0288-4771 2017 [Refereed]
     
    When a non-cylindrical probe tool is used, material adheres to the tool. This paper investigates the influence of this material on the characteristics of friction stir spot welds. This paper focuses on the material flow influenced by the material adhered to the tool. The influence of the material adhered to the tool on the mechanical properties of the friction stir spot lap joints, and on the material flow of the adhered material, is made clear. As the tool rotational speed changes, the morphology of the material adhered to the tool also changes. In a tensile-shear test, compared with the failure load of friction stir spot lap joints made using a tool without adhered material, the failure load of the friction stir spot lap joints made using a tool with adhered material is greater with a tool rotational speed of 3000 rpm, and lower with a tool rotational speed of 1000 rpm. However, the failure load of the friction stir spot lap joints is similar with tool rotational speeds of 1500 and 2250 rpm. The structural profiles are changed by the material flow, influenced by whether or not the material adheres to the tool. Also, the failure mode of the friction stir spot lap joints is different. The following patterns are observed when a tool with adhered material is used. In lower tool rotational speeds, the shear cross section is small because the stir zone is small. Also, in higher tool rotational speeds, the tensile cross section is big because the stir zone does not grow big enough to reach the surface of the upper sheet. However, from the measurement results of thrust force and torque during friction stir spot welding, it is suggested that the performance of the tool geometry does not change even if material adheres to the tool.
  • Akihiko Ikuta; Hideki Kyogoku; Hiroyuki Suzuki
    Key Engineering Materials Trans Tech Publications Ltd 749 199 - 204 1013-9826 2017 [Refereed]
     
    In this study, the characteristics of the production process of cemented carbide-Alumina composite material made using the wet-shaping process were investigated. The production process in this study produced a green compact of composite material by repeating the wet-shaping process for the molding of each material, and it made possible the sintering of plural materials with varying sintering conditions at the same time, a process that was difficult until now. By using wet-shaping and ultra-fine powder, which have superior sintering characteristics, sintering conditions were found in which it was possible to sinter cemented carbide and alumina at the same time, with a sintering temperature of 1723 K and a sintering time of 5.4 ks. With these sintering conditions, the relative densities of the sintered compact of cemented carbide and alumina were 99.0 % and 98.9 %, respectively. It is clear that the characteristics of sintered compact made with these sintering conditions are superior. When the cemented carbide slurry and the alumina slurry were layered by repeating the wet-shaping process, a composite material was able to be produced by inserting an active brazing filler metal in the interface to improve the bondability of the cemented carbide and the alumina during the sintering. However, it was observed that the active brazing filler metal and the cobalt in the cemented carbide flowed out from the interface between the cemented carbide and the alumina in the sintered compact of the composite material.
  • Tohru Nobuki; Minoru Hatate; Akihiko Ikuta; Yusuke Kawasaki; Naoji Hamasaka
    INTERNATIONAL JOURNAL OF METALCASTING SPRINGER INTERNATIONAL PUBLISHING AG 11 (1) 52 - 60 1939-5981 2017/01 [Refereed]
     
    The effects of nitro-carburizing or nitriding treatments on rotating-bending fatigue properties were investigated on four kinds of pearlitic ductile cast iron samples. In this study, we produced alloyed ductile cast iron samples containing V (0.1 %), Al (0.1 %) + Cr (0.1 %) and Al (0.1 %) + V (0.1 %). Tensile and hardness characteristics of the nitro-carburized samples were compared to those of the nitrided ones and as-cast ductile cast irons without alloying element. The iron nitride (gamma'-Fe4N) formed on the surfaces of the nitride samples, and the iron complex nitrides (epsilon-Fe2-3N) formed on the surfaces of the nitro-carburized ones. As a result, comparing with the same alloying content, the tensile strength and elongation of the nitro-carburized samples show the higher value than that of nitride ones. The micro-Vickers hardness tends to decrease with increase in distance from the sample surfaces. From the viewpoint of the nitride method, the hardness of nitride samples shows the higher value than that of the nitro-carburizing samples. Also, the maximum micro-Vickers hardness of nitrided layer at distance of 0.03 mm from sample surfaces increased with the increasing practical depth of nitrided layer. Therefore, the fatigue lives existing in the higher stress ranging from 500 to 650 MPa were found to be longer in the order of as-cast, nitro-carburized and nitrided samples. However, the fatigue limit of the lower stress zone existing at 410-450 MPa became no longer significant on endure limit by differences of nitiriding method. This means that the larger nitride layer depth and/or the higher hardness in the vicinity of surface acts to delay the fatigue crack generation on the fatigue characteristics of ductile cast iron samples.
  • 新提案FSWツールの鉄鋼材料への適用
    生田明彦
    2015年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 160 - 161 2016/07
  • Endo Eiji; Ikuta Akihiko; Nobuki Tohru; Hatate Minoru; Nakayama Hideki
    Journal of Japan Foundry Engineering Society Japan Foundry Engineering Society 88 (5) 276 - 281 1342-0429 2016/05 [Refereed]
     

      This study aims to investigate the influence of tempering temperature on strength, hardness, and wear characteristics of alloy tool steel casting. Test samples added with 0.5mass%Ti with lower C and Cr contents than those in SKD11 (JIS G4404) were manufactured by the investment casting process, and tempered at temperatures 453K, 573K, 673K, 773K, and 873K after quenching from 1293K. The amount of M7C3 type Cr carbides decreased, and continuity of the carbides was greatly reduced with the decrease of C and Cr contents. In addition MC type Ti carbides were observed in the matrix microstructure. Carbide structure did not change with varying tempering temperature. Although hardness tended to decrease with increasing tempering temperature, the hardness increased by secondary hardening at temperature of 773K and significantly decreased at 873K. Bending strength did not change largely with tempering temperature and showed maximum value at 453K. Fraction of wear loss did not change during tempering temperature from 473K to 773K but it increased significantly at 873K. The optimum tempering temperature for this alloy steel was found to be 453K from experimental results of strength, hardness, and wear characteristics.

  • Ikuta Akihiko
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 2016 68 - 69 2016 
    摩擦攪拌点接合において，ツールの摩耗は様々な要因が複雑に作用するため取り扱いが困難である．そのため，摩耗現象を可能な限り単純化する目的で，接合材料に金属基複合材料を用いることにより，主として機械的摩耗のみを発生させる加速試験を行って，ツールの摩耗特性を明らかにした．
  • Ikuta Akihiko
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 2016 172 - 173 2016 
    摩擦攪拌点接合において，ツールの摩耗によって特定箇所に形状変化が生じ，これによってツールの寿命を整理できる可能性が示された．しかしながら，ツールの寿命を判定するためにはその判定基準が重要となる．そのため，摩耗試験により実際に摩耗させたツールを用いて，ツールの判定基準として摩擦攪拌点接合継手の機械的性質とツールの形状変化との関連を明らかにした．
  • Akihiko Ikuta; Minoru Hatate; Tohru Nobuki
    MATERIALS TRANSACTIONS JAPAN INST METALS 57 (9) 1575 - 1580 1345-9678 2016 [Refereed]
     
    The machinability of austempered spheroidal graphite cast iron made by continuous casting (A-FCD600) was investigated. In this study, spheroidal graphite cast iron made by continuous casting (FCD600) was used to examine the influence of the austempering on machinability. In addition, austempered gray cast iron made by continuous casting (FC250) was used to examine the influence of the morphology of graphite on machinability. From the results of a tool wear test using continuous turning, the machinability decreased in the order of FC600, A-FC250 and A-FCD600. When relative machinability ratings between each material were calculated using tool life equations decided by the result of the tool wear test, the machinability of A-FCD600 was approximately 1.9 times inferior to FCD600, and approximately 1.3 times inferior to A-FC250. One characteristic of A-FCD600 was that its mechanical properties were relatively near steel. Therefore, a similar tool wear test was carried out with a P10 cemented carbide tool for steel. In this case, the tool life extended 25% compared to the K10 cemented carbide tool for cast iron. These results suggest that tool life can be improved in A-FCD600 cutting when tools for steel are used.
  • Akihiko Ikuta; Minoru Hatate; Tohru Nobuki
    MATERIALS TRANSACTIONS JAPAN INST METALS 57 (8) 1339 - 1344 1345-9678 2016 [Refereed]
     
    In this study, the machinability of austempered spheroidal graphite cast iron made by different casting methods was investigated. Spheroidal graphite cast iron samples made by sand mold casting and continuous casting, respectively ADI-S and ADI-C, were used. From the results of cutting tests, the machinability of ADI-C was always excellent compared with that of ADI-S at cutting speeds from 100 to 365 m/min. The feed and thrust forces of ADI-S were higher than those of ADI-C at high cutting speeds, although their-cutting resistance was almost the same at low cutting speeds. In addition, the microstructure of ADI-S chips was found to be greatly deformed near the chip-tool interface for ADI-S compared with ADI-C. It has been reported that there always exists retained austenite in austempered spheroidal graphite cast iron, and that the retained austenite transforms to deformation-induced martensite on the machined surface when the austempered spheroidal graphite cast iron is machined. From the results of the comparative analysis of ADI-S and ADI-C, the average relative volume ratio of retained austenite increased with increasing cutting speed for both ADI-S and ADI-C, and was about double in the case of ADI-S at high cutting speeds such as 365 m/min. From these results, it is clear that the retained austenite in both ADI-S and ADI-C does not transform to deformation induced martensite at high cutting speeds, and that ADI-C can be machined at cutting temperatures and with cutting resistances lower than those necessary for ADI-S, suggesting that the machinability of ADI-C is better than ADI-S.
  • Akihiko Ikuta; Thomas H. North; Yoshihiko Uematsu
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Japan Welding Society 34 (3) 159 - 166 0288-4771 2016 [Refereed]
     
    The characteristics of the application of the friction stir spot welding process to a keyhole which was produced at the friction stir spot welding, to refill the hole and make it disappear, were investigated. This paper focused on the material flow caused by a rotational tool, using a scrolled groove tool without a probe that could produce a material flow toward the rotating centre. The keyholes in lap joints of aluminium alloy disappeared when the FSSW conditions were a tool rotational speed of 1500 rpm, a plunging depth of 0.7 mm and a dwell time of 4 s, although gaps in the bottom of the keyhole was observed in some of them. From the observation results of the material flow conditions in this case, to eliminate the non-refill space and to transmit the rotary torque to the stir zone, it is suggested that it is important that the material flow to refill a keyhole and the deformation of the keyhole edges reach to the bottom of the keyhole at approximately the same time.
  • Ikuta Akihiko; Hatate Minoru; Nobuki Tohru
    Journal of Japan Foundry Engineering Society Japan Foundry Engineering Society 88 (1) 37 - 42 1342-0429 2016/01 [Refereed]
     

      The machinability of austempered spheroidal graphite cast iron made by continuous casting (A-FCD600) was investigated. In this study, spheroidal graphite cast iron made by continuous casting (FCD600) was used to examine the influence of the austempering on machinability. In addition, austempered gray cast iron made by continuous casting (FC250) was used to examine the influence of the morphology of graphite on machinability. From the results of a tool wear test using continuous turning, the machinability decreased in the order of FC600, A-FC250, and A-FCD600. When relative machinability ratings between each material were calculated using tool life equations decided by the result of the tool wear test, the machinability of A-FCD600 was approximately 1.9 times inferior to FCD600, and approximately 1.3 times inferior to A-FC250. One characteristic of A-FCD600 was that its mechanical properties were relatively near steel. Therefore, a similar tool wear test was carried out with a P10 cemented carbide tool for steel. In this case, the tool life extended 25% compared to the K10 cemented carbide tool for cast iron. These results suggest that tool life can be improved in A-FCD600 cutting when tools for steel are used.

  • 継手部の組織形状に着目したFSWツール形状の探索
    生田明彦
    2014年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 139 - 140 2015/08
  • Hatate Minoru; Nobuki Tohru; Ikuta Akihiko; Hamasaka Naoji; Kawasaki Yusuke
    Journal of Japan Foundry Engineering Society Japan Foundry Engineering Society 87 (6) 382 - 387 1342-0429 2015/06 [Refereed]
     

      The effects of nitrocarburizing or nitriding treatments on rotating-bending fatigue properties were investigated on four kinds of pearlitic FCD700 (JIS G5502) -class ductile cast iron samples with V (0.1%), Al (0.1%), Al (0.1%) & Cr (0.1%) and Al (0.1%) &V (0.1%). Tensile and hardness characteristics of the nitrocarburized samples were compared to those of the nitrided ones and as-cast FCD700 without alloying element. Fe4N nitride formed on the surfaces of the nitrided samples, while Fe4N and Fe2-3N nitrides formed on the surfaces of the nitrocarburized ones. The practical nitrided depth and micro-Vickers hardness at 0.03mm below the surface in the nitride layer of the nitrided samples were larger and higher than those of nitrocarburized ones, respectively. The addition of alloying elements to the nitrided and nitrocarburized samples increased the practical nitrided depth and hardness in the vicinity of the surface, compared to the samples without alloying element. The fatigue existing in the higher stress range from 500 to 650MPa was found to be longer in the order of as-cast FCD700, nitrocarburized and nitrided samples. However, the fatigue limit at 107 cycles in the lower stress range ranged from 410 to 450MPa and no significant difference was seen among the nitrocarburized and nitrided samples. The improvement of fatigue characteristics by nitrocarburing and nitriding treatments is considered to be efficient only in higher stress ranges. The fatigue strength in high stress ranges is considered to be related to the difference in the initiation time of the fatigue crack. This suggests that the larger the nitrided depth and/or the higher the hardness in the vicinity of surface promoted by the addition of alloying elements, the more delayed will the crack initiation be.

  • Ikuta Akihiko; Hatate Minoru; Nobuki Tohru
    Journal of Japan Foundry Engineering Society Japan Foundry Engineering Society 87 (4) 231 - 238 1342-0429 2015/04 [Refereed]
     

      In this study, the machinability of austempered spheroidal graphite cast iron made by different casting methods was investigated. Spheroidal graphite cast iron samples made by sand mold casting and continuous casting, respectively ADI-S and ADI-C, were used. From the results of cutting tests, the machinability of ADI-C was always excellent compared with that of ADI-S at cutting speeds from 100 to 365m/min. The feed and thrust forces of ADI-S were higher than those of ADI-C at high cutting speeds, although their cutting resistance was almost the same at low cutting speeds. In addition, the microstructure of ADI-S chips was found to be greatly deformed near the chip-tool interface for ADI-S compared with ADI-C. It has been reported that there always exists retained austenite in austempered spheroidal graphite cast iron, and that the retained austenite transforms to deformation-induced martensite on the machined surface when the austempered spheroidal graphite cast iron is machined. From the results of the comparative analysis of ADI-S and ADI-C, the average relative volume ratio of retained austenite increased with increasing cutting speed for both ADI-S and ADI-C, and was about double in the case of ADI-S at high cutting speeds such as 365m/min. From these results, it is clear that the retained austenite in both ADI-S and ADI-C does not transform to deformation-induced martensite at high cutting speeds, and that ADI-C can be machined at cutting temperatures and with cutting resistances lower than those necessary for ADI-S, suggesting that the machinability of ADI-C is better than ADI-S.

  • Akihiko Ikuta; Hideki Kyogoku; Hiroyuki Suzuki
    Key Engineering Materials Trans Tech Publications Ltd 656-657 86 - 91 1013-9826 2015 [Refereed]
     
    In this study, production processes for porous alumina, and the characteristics of the material, were investigated. Porous alumina was produced by a wet-shaping process in which air bubbles were introduced into the slurry. The feature of this production process is that many pores are produced by slip casting carried out using whipped slurry, where only the conditions of the slurry are adjusted. The advantage of this process is its simplicity. From the results, it is made clear that a green compact of porous alumina can be produced by changing the amount of solvent and binder, and also that a sintered compact of porous alumina can be produced by a low sintering temperature, such as 1473 K. The four point bending strength of porous alumina is about 515 MPa when the porosity is about 30 %. The excellent characteristics of the sintered compact of porous alumina are shown by the observation results of the fracture surface in this production process. The dense alumina body is sintered while maintaining the fine grains, and with the micro pores remaining in the grain boundary.
  • 摩擦発熱現象を利用した低温プロセスによる接合/改質技術の高度化
    生田明彦
    2013年度大阪大学接合科学共同利用・共同研究拠点共同研究報告書 3 - 4 2014/08
  • Ikuta Akihiko; North Thomas H.; Kyogoku Hideki
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 2014 44 - 45 2014 
    摩擦攪拌点接合において，塑性流動を効率的に発生させるためには接合材料をせん断的に変形させることが重要であると考えられる．そのため，プローブ部について切削工具の知見を取り入れて形状設計された接合ツールを用いた場合，接合継手の機械的性質におよぼす影響について調査した．
  • Ikuta Akihiko; North Thomas H.; Kyogoku Hideki
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 2014 42 - 43 2014 
    一般的な円柱型プローブツールとは塑性流動状態が異なることが示唆されている三角柱型プローブツールについて，接合材料が付着した状態で摩擦攪拌点接合を行い，接合継手におよぼす付着物の影響について，接合材料の塑性流動の状態をトレーサ法により可視化して調査を行った．
  • IKUTA Akihiko; KYOGOKU Hideki; NORTH H. Thomas; TOZAKI Yasunari; UEMATSU Yoshihiko
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 93 36 - 37 2013/08 
    プローブつきツールを用いた摩擦攪拌点接合後に，渦溝ツールを用いて再度摩擦攪拌接合することにより，接合後に残るキーホール消失技術について検討を行った．特に，渦溝ツールが有する特徴的な塑性流動状態に着目し，継手部の組織形態の変化から，その特徴について調査した．
  • IKUTA Akihiko; KYOGOKU Hideki; NORTH H. Thomas; TOZAKI Yasunari; UEMATSU Yoshihiko
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 93 38 - 39 2013/08 
    プローブつきツールを用いた摩擦攪拌点接合後に，渦溝ツールを用いて再度摩擦攪拌接合することにより，接合後に残るキーホール消失技術について接合条件の検討を行った．このとき，接合部の塑性流動および変形挙動から，効率的にキーホールを消失させるための指針を明確化するため調査を行った．
  • 京極秀樹; 生田明彦; 上森武; 山根卓也; 吉川研一; 大森整
    近畿大学次世代技術研究所研究報告 近畿大学次世代基盤技術研究所 4 71 - 76 2185-8802 2013/07 
    ［Abstract］In this study, the fabrication conditions of tool steel by direct selective laser sintering were investigated using two kinds of -45 μm and -105/+45 μm SKD11 powders. The effect of powder size on the state of laser-scanned body was examined to fabricate a sound laser-scanned body of tool steel. Moreover, the measurement of a simple shaped product fabricated under the optimum condition was performed to determine whether it conforms to the design specification. The optimum laser power, scan speed, scan pitch, and layer thickness were obtained by experiments. As a result, a simple shaped product could be fabricated successfully under the optimum condition by using -105/+45 μm powder.
  • 摩擦攪拌点接合ツールの塑性流動
    生田 明彦; 京極 秀樹; T. H. North
    近畿大学次世代技術研究所研究報告 4 2013/06
  • IKUTA Akihiko; YIN Yuhuan; NORTH H. Thomas
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 92 94 - 95 2013/03 
    断面寸法を相似形状とした三角柱型プローブを有するいくつかの接合ツールを用いて，異材アルミニウム合金の摩擦攪拌点接合を行った．その際，接合ツール寸法の違いが継手におよぼす影響として，継手部の機械的性質，組織形態および発熱量等に着目して，それらとの関連性について調査した．
  • Hideki Kyogoku; Takeshi Uemori; Akihiko Ikuta; Kenichi Yoshikawa; Hitoshi Ohmori
    PROCEEDINGS OF THE ASME/ISCIE INTERNATIONAL SYMPOSIUM ON FLEXIBLE AUTOMATION, ISFA 2012 AMER SOC MECHANICAL ENGINEERS 465 - 468 2013 [Refereed]
     
    In this study, the fabrication conditions of WC cemented carbides by direct selective laser melting were investigated. The effects of additives, such as Co, Cu-20%Sn and Cu powders, and laser scanning conditions on laser sintering process were examined to fabricate a sound laser-scanned body of WC cemented carbides. The optimum laser power, scan speed and scan pitch were found out by experiments. It was found that the continuously smooth single-scan track can be obtained at a lower laser power and a higher scan speed by the addition of 30% Cu powder. The smooth surface of the laser-scanned body could be fabricated at a laser power of 9 W, a scan speed of 20 mm/s and a scan pitch of 0.05 mm.
  • A. Ikuta; Y. H. Yin; T. H. North
    SCIENCE AND TECHNOLOGY OF WELDING AND JOINING MANEY PUBLISHING 17 (8) 622 - 629 1362-1718 2012/11 [Refereed]
     
    The influence of threaded and wear simulated (half thread) tools on the mechanical properties of dissimilar Al alloy friction stir spot welds is investigated. With lower tool rotational speed settings, the failure loads of Al 5754/Al 6111 lap joints made using a threaded tool were clearly higher than that of a half thread tool. However, the failure load of the joints made using a half thread tool increased when the tool rotational speed increased, and finally, as the rotational speed was further increased, the failure load became almost the same as the failure load of joints made using a threaded tool. In Al 5052/Al 6061 butt joints made using the threaded and half thread tools, the area of the stir zone on the bonded cross-section corresponded with the actual bonded region on the fracture surface. Therefore, the thread on the rotating pin has limited influence on the mechanical properties of the friction stir spot lap joints.
  • IKUTA Akihiko; YIN Yuhuan; THOMAS NORTH H.
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 91 226 - 227 2012/09 
    寸法の異なる三角柱型プローブを有する接合ツールを用いて，異材アルミニウム合金の摩擦攪拌点接合を行った．その際の接合ツール寸法および接合条件によって変化する継手組織の形態および寸法の観点から，接合ツールの寸法が継手の機械的性質におよぼす影響を調査した．
  • 京極秀樹; 生田明彦; 上森武; 柿迫健; 吉川研一; 大森整
    近畿大学次世代技術研究所研究報告 近畿大学次世代基盤技術研究所 3 55 - 60 2185-8802 2012/07 
    [Abstract] In this study, the fabrication conditions of tool steel by direct selective laser sintering were investigated. The effects of powder size, additives such as Cu and Ni powders, and laser sintering conditions on the state of laser-scanned body were examined to fabricate a sound laser-scanned body of tool steel. The optimum laser power, scan speed and scan pitch were examined by experiments. As a result, it was found that the continuously smooth single-scan track can be obtained at wider range between laser power and scan speed by using SKD11 powder below 45 μm. The smooth surface of the laser-scanned body could be fabricated at a laser power of 10 W, a scan speed of 10 mm/s and a scan pitch of 0.08 mm by using SKD11 powder below 45 μm.
  • IKUTA Akihiko; YIN Yuhuan; NORTH H. Thomas
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 90 176 - 177 2012/03 
    三角柱型プローブを有する接合ツールを用いて，異材アルミニウム合金の摩擦攪拌点接合を行った．その際，一般的な円柱型プローブツールの場合とは異なる材料流動が観察されたため，その生成挙動についてトレーサ材料および形状を変化させた接合ツールを用いて調査した．
  • IKUTA Akihiko; YIN Yuhuan; NORTH H. Thomas
    Preprints of the National Meeting of JWS JAPAN WELDING SOCIETY 90 178 - 179 2012/03 
    三角柱型プローブを有する接合ツールを用いて，異材アルミニウム合金の摩擦攪拌点接合を行った．その際，プローブねじの有無や接合条件によって変化する継手組織の形態および寸法の観点から，接合ツール形状が継手の機械的性質におよぼす影響を調査した．
  • Akihiko Ikuta; Yuhuan Yin; Thomas H. North
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society 溶接学会 30 (2) 107 - 115 0288-4771 2012 [Refereed]
     
    Friction stir spot welding of dissimilar aluminium alloys using the three-flat tool is carried out in order to investigate the effects of probe geometry on mechanical properties. The failure loads in A5754/A6111 lap joints made using a three-flat 0.5 mm no-thread tool were always higher than the joints made using a three-flat 0.5 mm threaded tool. Material flows due to the shear deformations were observed in the stir zone of A5754/A6111 and A5052/A6061 lap joints made using the three-flat tools. In addition, the bonded and stir zone widths in A5052/A6061 lap joints made using a three-flat 0.7 mm no-thread tool (in which the arc lengths of the triangular vertex region in the cross-section of probe were shortened) were always smaller than the joints made using a three-flat 0.5 mm no-thread tool. Therefore, it is suggested that there are pressures in a horizontal direction which are produced by the triangular vertex regions on the probe.
  • 生田 明彦; 旗手 稔; 信木 関; 京極 秀樹
    鋳造工学 全国講演大会講演概要集 公益社団法人 日本鋳造工学会 161 69 - 69 2012
  • 摩擦攪拌点接合におけるツールねじの役割
    生田明彦; T; H. North; 尹玉環
    摩擦接合 10 (1) 1 - 15 2011/12
  • 京極秀樹; 生田明彦; 上森武; 白地貴之; 吉川研一; 大森整
    近畿大学次世代技術研究所研究報告 近畿大学次世代基盤技術研究所 2 95 - 100 2185-8802 2011/07 
    [Abstract] In this study, the fabrication conditions of WC cemented carbides by direct selective laser melting were investigated. The effects of additives, such as Co, Cu-20％Sn and Cu powders, and laser melting conditions on laser scanning process were examined to fabricate a sound laser-scanned body of WC cemented carbides. The optimum laser power, scan speed and scan pitch were found out by experiments. It was found that the continuously smooth single-scan track can be obtained at a lower laser power and a higher scan speed by the addition of 30％ Cu powder. The smooth surface of the laser-scanned body could be fabricated at a laser power of 9 W, a scan speed of 20 mm/s and a scan pitch of 0.05 mm.
  • Y. H. Yin; A. Ikuta; T. H. North
    Materials and Design 31 (10) 4764 - 4776 0264-1275 2010/12 [Refereed]
     
    The microstructural features and mechanical properties of AM60 and AZ31 friction stir spot welds are investigated in joints made using different tool designs (threaded and three-flat/threaded tools) and dwell time settings. Since the hook regions are curved inwards towards the keyhole periphery in AM60 friction stir spot welds made using threaded and three-flat/threaded tools and different dwell time settings, the distance from the tip of the hook region to the keyhole periphery mainly determines their failure load properties. In contrast, the hook regions are curved outwards from the axis of the rotating tool in AZ31 friction stir spot welds and their failure strength properties are determined by the bonded width, the distance from the tip of the hook region to the sheet intersection, the depth of tool shoulder penetration into the surface of the upper sheet and the distance from the tip of the hook region to the top of the welded joint.The highest failure load properties are found in AM60 friction stir spot welds made using a three-flat/threaded tool and dwell times of 3 and 4. s, since the distance from the tip of the hook region to the keyhole periphery is highest in these joints. The highest failure load properties are found in AZ31 friction stir spot welds made using the three-flat/threaded tool and a dwell time of 1. s, since these joints have the largest bonded widths, distances from the tips of the hook regions to the sheet intersection, and limited penetration of the tool shoulder into the surface of the upper sheet (about 0.5 mm). © 2010 Elsevier Ltd.
  • Y. H. Yin; A. Ikuta; T. H. North
    MATERIALS & DESIGN ELSEVIER SCI LTD 31 (10) 4764 - 4776 0261-3069 2010/12 [Refereed]
     
    The microstructural features and mechanical properties of AM60 and AZ31 friction stir spot welds are investigated in joints made using different tool designs (threaded and three-flat/threaded tools) and dwell time settings. Since the hook regions are curved inwards towards the keyhole periphery in AM60 friction stir spot welds made using threaded and three-flat/threaded tools and different dwell time settings, the distance from the tip of the hook region to the keyhole periphery mainly determines their failure load properties. In contrast, the hook regions are curved outwards from the axis of the rotating tool in AZ31 friction stir spot welds and their failure strength properties are determined by the bonded width, the distance from the tip of the hook region to the sheet intersection, the depth of tool shoulder penetration into the surface of the upper sheet and the distance from the tip of the hook region to the top of the welded joint. The highest failure load properties are found in AM60 friction stir spot welds made using a three-flat/threaded tool and dwell times of 3 and 4 s, since the distance from the tip of the hook region to the keyhole periphery is highest in these joints. The highest failure load properties are found in AZ31 friction stir spot welds made using the three-flat/threaded tool and a dwell time of 1 s, since these joints have the largest bonded widths, distances from the tips of the hook regions to the sheet intersection, and limited penetration of the tool shoulder into the surface of the upper sheet (about 0.5 mm). (C) 2010 Elsevier Ltd. All rights reserved.
  • IKUTA Akihiko
    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY JAPAN WELDING SOCIETY 79 (7) 680 - 683 0021-4787 2010/10
  • Akihiko Ikuta; Yuhuan Yin; Thomas H. North
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society 28 (3) 346 - 354 0288-4771 2010 [Refereed]
     
    The influence of threaded and wear simulated (half-thread) tools on the mechanical properties of dissimilar Al-alloy friction stir spot welds is investigated. The failure load properties of dissimilar A5754/A6111. lap joints produced using wear simulated (half-thread) tools were much poorer in joints made using tool rotational speeds of 1000 and 1500 RPM. Similar failure load properties were produced using these tools, when the tool rotational speed was increased to 2250 RPM. In joints made using a tool rotational speed of 3000 RPM, the failure load properties of joints made using the half-thread tool were higher than those of joints made using the threaded tool. Similar failure load properties were found in A5052/A6061 lap and butt joints made using threaded, half threaded and no thread tools and a tool rotational speed of 1000RPM. Also, the failure load properties of lap joints made using the different tools corresponded with their bonded widths and Y values. The area of the stir zone on the bonded cross-section corresponded with the actual bonded region on the fracture surface of A5052/A6061. butt joints. However, the weld profiles were different from those in A5052/A6061 lap joints. It is therefore suggested that the failure load properties of lap joints are similar when the bonded widths and Y values are similar. In addition, the thread on the cylindrical probe has negligible influence on the mechanical properties of lap joints. The major role played by the thread involves stirring in the vertical direction. Stirring in the horizontal direction is unchanged in joints made using the different tools.
  • 生田明彦; 深谷保博; 京極秀樹; 鈴木裕之
    近畿大学工学部研究報告 近畿大学工学部 44 (44) 25 - 30 0386-491X 2010 
    [synopsis]The wet-shaping process had been used the slurry that dispersed the powder in the solvent. In this study, for the multipurpose utilizations of the wet-shaping process, the alumina cutting tool was adopted as an example of application. For the reason, the investigation of sintering conditions and the cutting test of produced tool ware carried out. And, it was examined whether the wet-shaping process was effective to produce for the alumina cutting tool as the chipping resistance. From the results, the characteristic of sintered alumina were kept high performance balance, because there were shown to the relative density of 99％, the hardness of Hv1937, the fracture toughness of 3-4 MPa • m^<1/2>, the 4-point bending strength of 711MPa and the grain size of 2μm in each sintering condition. In addition, from the results of cutting test, the large-scale chipping was not occurred to the cutting face in low cutting speed. Therefore, the produced tool by the wet-shaping process was effective for the chipping in cutting.
  • 生田 明彦; 旗手 稔; 深谷 保博; 京極 秀樹; 信木 関
    鋳造工学 全国講演大会講演概要集 公益社団法人 日本鋳造工学会 154 54 - 54 2009
  • 生田 明彦; 旗手 稔; 深谷 保博; 京極 秀樹; 信木 関
    鋳造工学 全国講演大会講演概要集 公益社団法人 日本鋳造工学会 153 91 - 91 2008
  • Ikuta Akihiko; Fukaya Yasuhiro; Kobatake Syohei; Shinozaki Kenji; Kuroki Hidenori; Yamane Yasuo; Aritoshi Masatoshi; Hamaguchi Kazuya
    Proceedings of JSPE Semestrial Meeting The Japan Society for Precision Engineering 2006 283 - 284 2006 
    This study aim is to examine the cutting temperature of difficult–to–machine materials in the adhesion interface by the friction welding model. Results of FEM analysis by using the measurement temperature of friction welding, the calculated temperature was about 850K in the bonded interface between titanium alloys and cemented carbide. In the cutting, there was a possibility that the work materials adhered to the tools at this calculated temperature by the friction welding model. Therefore, the possibility to examine of the cutting temperature by the friction welding model was shown.
  • Akihiko Ikuta; Yasuhiro Fukaya; Shohei Kobatake; Kenji Snozaki; Hidenori Kuroki; Yasu Yamane; Masatoshi Aritoshi; Kazuya Hamaguchi
    Progress of Machining Technology, Proceedings JAPAN SOC PRECISION ENGINEERING-JSPE 137 - 140 2006 [Refereed]
     
    The purpose of this study is to clarify the cutting temperature in an adhesion interface by modeling the cutting process in titanium alloys such as Ti-6Al-4V and beta-Ti. In this study, the modeling methods were used friction welding and the irradiation of a YAG laser. When measuring the cutting temperature, the thermo-couple was attached to a cemented carbide tool, the cutting temperature of beta-Ti alloy was 460K in the rake face of tool even if the cutting time was only 10s and the cutting speed 100m/min. Moreover, when the laser irradiation power was 450W for 10s, the temperature on the rake face of the tool was 440K, almost the same as the cutting of the beta-Ti alloy. hi addition, in measuring the friction welding temperature of the titanium alloys and cemented carbide rod, the friction welding temperature had a rapid heating rate for 0.4s from the beginning the same as the cutting. In, the calculation result of heat conduction analysis that used FEM that was changed only in power, there was a correlation between the cutting and the two models such as the friction welding and the laser irradiation in micro-area of heat conduction interface. From the results, the possibility that the cutting temperature of titanium alloys can be estimated in a short time and in a micro-area is shown by the friction welding and laser irradiation model.
  • 切削過程における凝着現象の材料学的検討
    生田明彦; 篠崎賢二
    高温学会誌 32 (3) 151 - 159 2006
  • Yasuhiro Fukaya; Akihiko Ikuta; Tatsuhiko Ihara; Masahiro Andou; Yuuya Nakagiri; Toshirou Kobayashi
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Japan Welding Society 22 (1) 156 - 162 0288-4771 2004 [Refereed]
     
    Bonding of glassy carbon composite by brazing with Slier metal and sinter bonding with adhesive resin using direct current heating and sufficient pressing was studied after investigation of microstructure and component of composite. Al, Ag-Cu-Ti, Ni-Cr-B were used for filler metal and phenolic adhesive resin containing graphite powders and hardening material was used for adhesive resin. Joint properties were evaluated by microstructure and bending strength of joint Main results obtained are as follows: (1) This carbon composite had piled structure of black color layer and white color layer containing black color layer locally. It was confirmed by XPS that black color layer was graphite powder rich layer containing glassy carbon and white color layer containing black color layer locally was glassy carbon rich layer containing graphite powder, carbon fiber. It was confirmed by microstructure observation and XPS mat top surface of composite (surface of 1st black color layer) was the most glassy carbon rich layer. (2) Polishing of joint surface is necessary for obtaining of adequate roughness and flatness. Component of bonding surface varies with this polishing of joint surface. (3) Relationship between joint properties and various bonding surface was investigated. At Al, Ag-Cu-Ti, Ni-Cr-B brazing, wettability of filler metal to each bonding surface was very poor and 4 point bending strength of joint was zero in any bonding surface. At sinter bonding with phenolic adhesive resin, 4 point bending strength of black color layer joint was about 20 MPa and that of white color layer joint containing black color layer locally was about 10 MPa. These bending strength of joint were lower than bending strength of base carbon composite (124 MPa). Bonding did not advance at top surface of composite (surrace of 1st black color layer: the most glassy carbon rich layer). It was assumed from these results that bending strength of joint decreased with increase of glassy carbon. Plasma discharge in H2O atmosphere for black color layer (polishing surface of 1st black color layer: polishing 5 μm) was effective to increase of bending strength of joint 4 point bending strength of plasma discharged joint was about 35 MPa.
  • Yasuhiro Fukaya; Akihiko Ikuta; Tatsuhiko Ihara; Masahiro Andou; Toshirou Kobayashi
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Japan Welding Society 22 (1) 149 - 155 0288-4771 2004 [Refereed]
     
    Bonding of high density graphite by brazing with filler metal and sinter bonding with adhesive resin using direct current heating and sufficient pressing was studied. Radiative heating and slight pressing were also tested for comparison. Al, Ag-Cu-Ti, Ni-Cr-B were used for filler metal and phenolic adhesive resin containing graphite powders and hardening material was used for adhesive resin. Joint properties were evaluated by microstructure and bending strength of joint. Main results obtained are as follows: (1) At Al, Ag-Cu-Ti, Ni-Cr-B brazing using radiative heating and slight pressing (1.5×10 -3 MPa), wettability of filler metal to graphite was very poor and 4 point bending strength of joint was low extremely. At Al, Ag-Cu-Ti, Ni-Cr-B brazing using direct current heating and sufficient pressing (9.8 MPa), above mentioned wettability was improved and 4 point bending strength of joint increased. But, 4 point bending strength of the later brazing joint was lower than bending strength of base graphite (78 MPa). This difference is based on generation of void and cavity. (2) At sinter bonding with phenolic adhesive resin using radiative heating and slight pressing (1.5×10-3 MPa), voids generated in adhesive resin and 4 point bending strength of joint was low. At sinter bonding with phenolic adhesive resin using direct current heating and sufficient pressing (9.8 MPa), voids disappeared and 4 point bending strength of joint equivalent to bending strength of base graphite (78 MPa) was obtained. This difference is based on generation of void in phenolic adhesive resin. (3) It was confirmed by gas analysis test that H2O gas generated by condensation-polymerization reaction of phenolic adhesive resin at heating. Removal of H2O gas is important, because H2O gas causes voids in phenolic adhesive resin. Holding at 353-393 K and sufficient pressing at sinter bonding process are effective for removal of H2O gas in phenolic adhesive resin.
  • 湿式成形法による複合傾斜化工具の試作
    生田明彦; 深谷保博; 山口由高; 鈴木裕之
    近畿大学工学部研究報告 38 57 - 62 2004
  • 切削時における凝着界面の反応相生成に関する熱力学的検討
    生田明彦; 深谷保博; 篠崎賢二; 黒木英憲
    近畿大学工学部研究報告 38 51 - 56 2004
  • FUKAYA Yasuhiro; IKUTA Akihiko; NAKAGIRI Yuuya; SHIGEMURA Sadato; SUITU Tatsuo; KOBAYASHI Toshirou
    Pre-Prints of the National Meeting of JWS Japan Welding Society (73) 328 - 329 2003/09
  • FUKAYA Yasuhiro; IKUTA Akihiko; MIYANAGA Shigeyuki; KOBAYASHI Toshiro; HIGASHI Yasuo
    Pre-Prints of the National Meeting of JWS Japan Welding Society (73) 310 - 311 2003/09
  • 生田明彦; 深谷保博; 篠崎賢二; 山根八洲男; 黒木英憲; 増田秀基; 有年雅敏
    近畿大学工業技術研究所研究報告書 近畿大学工業技術研究所 3 26 - 32 1346-2903 2003/05
  • 湿式成形法によるアルミナ系セラミックスの焼結特性
    生田明彦; 深谷保博; 山口由高; 鈴木裕之
    近畿大学工学部研究報告 37 35 - 42 2003
  • 燃料電池の開発と接合・加工技術
    深谷保博; 生田明彦; 小林敏郎
    溶接技術 51 4  2003
  • Akihiko Ikuta; Kenji Shinozaki; Hideki Masuda; Yasuo Yamane; Hidenori Kuroki; Yasuhiro Fukaya
    Journal of Materials Processing Technology 127 (2) 251 - 255 0924-0136 2002/09 [Refereed]
     
    In this study, solid-state diffusion bonding between Ti alloys and a cemented carbide tool was explored, and then the bonded interface of the joints was observed in detail. Moreover, a high-temperature 4-point bending test of the bonded joints was carried out. Then, the reaction phenomenon between the work material, and the tool and the high-temperature strength of the bonded interface were evaluated, and the adhesion mechanism was examined. It was concluded that βC Ti alloy bonded easily to the cemented carbide tool during cutting and moreover, the bonding strength might be high because of the layered TiC phase. Therefore, the possibility of fracture inside the cemented carbide became high, and thus the tool life became lower. © 2002 Elsevier Science B.V. All rights reserved.
  • IKUTA Akihiko; SHINOZAKI Kenji; MASADA Hideaki; YAMANE Yasuo; KUROKI Hidenori; ARITOSHI Masatoshi; FUKAYA Yasuhiro
    Journal of the Japan Society of Precision Engineering The Japan Society for Precision Engineering 68 (6) 838 - 843 0912-0289 2002/07 [Refereed]
     
    The purpose of this study is to clarify the adhesion mechanism in cutting process on the difficult-to-machine material such as Ni-base alloys like Inconel 718,Inconel 600 and so on. For the elucidation of the adhesion mechanism, it seems to be important to know the reaction which is generated at the interface between cutting tool and material. However, it is difficult that the reactive phenomenon is observed in detail because the region where cutting tool contacts the material in cutting process is very small. Then, the friction welding test between cutting tool material, K10 (8mm diameter) and material was carried out. The reactive phenomenon between cutting tool and material in cutting process was analogized by the observation of the interface of friction welded joint. In addition, 4 point bending test at high temperature was carried out for diffusion bonding joint between K10 and material at 1373K. From analyzing fracture strength and rupture position, the strength of the bonded interface between K1O and material was examined. As a result of the friction welding test, Ni-base alloys and K1O were bonded together only for the friction time of 0.4s. Friction welding of Inconel 718 was easy to be done in comparison with Inconel 600 and pure Ni. In either material, the reaction layer was not observed in the interface of friction welding. On the other hand, the width of the reaction layer increased with the increase in the bonding time in the interface of the diffusion bonding joint. The growth of the reaction layer was the biggest in Inconel 718. This reaction phase was the η phase. High-temperature bending strength of the diffusion bonding joint in Inconel 718 and Inconel 600 was bigger than that in pure Ni. From the above experimental result, the reason why Inconel 718 and Inconel 600 are easy to adhere to cutting tool comparing with pure Ni was seemed to be that these materials were easy to react with cutting tool and bonding strength between these materials and cutting tool were high.
  • Yasuhiro Fukaya; Akihiko Ikuta; Kouhei Iwanishi; Yasuo Takahashi; Yasuo Yamane; Yasuo Higashi; Toshirou Kobayashi
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Japan Welding Society 20 (2) 207 - 212 0288-4771 2002 [Refereed]
     
    Numerical analysis of bonded area at diffusion bonding was indicated by Takahashi at Quarterly Journal of the JWS (1985). Relationship between percent bonded area by this analysis and joint strength for diffusion bonding of ultra fine machined copper was evaluated. Bonding parameters are low temperature (473∼973 K) and extensive low pressure (0.005∼0.15 MPa). Details of bonding test were reported by authors at Quarterly Journal of the JWS (1997). Main results are as follows: (1) It was confirmed that percent bonded area with numerical analysis proposed by Takahashi were nearly equivalent to the ratio of joint strength/copper base metal strength. The ratio of joint strength/copper base metal strength is 95∼100% when percent bonded area with numerical analysis is 100% and 7∼14% over than percent bonded area with numerical analysis at another case. (2) This numerical analysis is effective for practical use at diffusion bonding of ultra fine machined copper by low bonding temperature and pressure.
  • Y. Fukaya; Y. Okumoto; A. Ikuta; H. Yoshikawa
    Research Reports of the Faculty of Engineering, Kinki University サイバネットシステム 35 (35) 25 - 33 0386-491X 2001/12
  • Y. Fukaya; Y. Okumoto; A. Ikuta; H. Kuroki; K. Shinozaki; T. Kobayashi
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Japan Welding Society 19 (2) 336 - 344 0288-4771 2001 [Refereed]
     
    Crack propagates in Al2O3 when Al2O3 is bonded to SUS304 by Ag-Cu-Ti brazing. This crack is due to residual stress in Al2O3. Bonding Al2O3 to SUS304 by pulse current heated bonding after brazing Ag, Cu thin plate to Al2O3, SUS304 was studied for the purpose of prevention of this crack. Effect of residual stress relief was evaluated with thermo-elasto-plastic analysis by FEM and joint properties were investigated by bonding test. Main results obtained are as follows: (1) It was confirmed with FEM that residual stress in Al2O3 could be reduced by proposed bonding method. Insert of soft metal (Ag, Cu) and thermal load reduction by pulse current heated bonding are effective for residual stress relief in Al2O3. (2) Crack in Al2O3 doesn't generate and excellent joint strength is obtained by proposed bonding method. Joint strength obtained by optimum bonding parameters is 119-122 MPa (average value) at 4 point bending test.
  • 篠崎賢二; 生田明彦; 増田秀基; 山根八洲男; 黒木英憲; 深谷保博
    精密工学会誌 66 (3) 414 - 418 2000/03 [Refereed]
  • 篠崎賢二; 生田明彦; 増田秀基; 山根八洲男; 黒木英憲; 有年雅敏; 深谷保博
    精密工学会誌 66 (2) 224 - 228 2000/02 [Refereed]
  • Akihiko Ikuta; Kenji Shinozaki; Hideki Masuda; Hidenori Kuroki; Yasuo Yamane; Yasunori Fukaya
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society Japan Welding Soc 18 (2) 280 - 287 0288-4771 2000 [Refereed]
     
    The purpose of this study is to make clear the mechanism of adhesion of cutting tool to metals which causes the deterioration of tool life. Various titanium alloys such as commercially pure titanium, Ti-6Al-4V alloy and βC-Ti alloy were used as a work materials, and the cemented carbide (K10) was used as a cutting tool. Both a short-time cutting test and a diffusion bonding test were carried out to investigate the properties of adhesion, the bondability and the form of reaction phases between the cutting materials and tool. The cutting test showed that βC-Ti was most prone to adhere to K10 comparing with Ti and Ti-6Al-4V. According to the bonding test of the titanium alloys to the cemented carbide at a bonding temperature of 1473 K, they were bonded even for a bonding time less than 1 s forming reaction phases at the interface. These reaction phases consisted of the titanium carbide and η phase (Co2W4C, Co3W3C) for all titanium alloys used. However, the morphologies of titanium carbide were massive for Ti, hump for Ti-6Al-4V alloy and layered type for βC-Ti alloy. From these results, it can be concluded that the properties of adhesion of the titanium alloys to the cemented carbide are related to the bonding strength of joint.
  • H Yara; T Makishi; H Arasaki; A Ikuta
    PROCEEDINGS OF THE SEVENTH (1997) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL IV, 1997 INTERNATIONAL SOCIETY OFFSHORE& POLAR ENGINEERS 602 - 606 1098-6189 1997 [Refereed]
     
    Thermal spraying is one of the coating methods to improve the wear, heat and corrosion resistant properties of the metals and alloys [1,2]. The thermal spray coating technique is used to many kinds of thermal spray materials, and it becomes one of the objects of the surface treatment. In order to investigate the fatigue strength of the partially thermal sprayed specimens, the rotating bending fatigue test has been conducted under accelerated corrosive environment cycled among the salt water spray, the dry in the warm air and the exposure in the open air at room temperature. Experimental studies on fatigue strength were performed under corrosive environment by using partially thermal sprayed Zn and Al powder spray materials to medium carbon steels (S45C). Some fundamental data on the mechanical and metallurgical properties of the fatigue strength under corrosive environment were obtained by using partially thermal sprayed specimens. The data is discussed with a view to optimizing the methods, and also it is compared with those of the non-sprayed and painted specimens in terms of fatigue limit and Vickers hardness tests. and the macro and micro structural observations were also made with microscopes and SEM.
  • 鋳造プロセスによる自溶合金溶射皮膜をインサート材として作製した鋳鉄/炭素鋼クラッド材の接合特性
    屋良秀夫; 生田明彦; 国吉和男
    溶射 32 (2) 1 - 6 1995/07 [Refereed]
  • 屋良秀夫; 生田明彦
    溶接学会論文集 13 (2) 223 - 227 0288-4771 1995/05 [Refereed]
  • Hideo Yara; Akihiko Ikuta
    QUARTERLY JOURNAL OF THE JAPAN WELDING SOCIETY 13 (4) 540 - 543 0288-4771 1995 [Refereed]
     
    The joining between stainless steel (SUS304) and carbon steel (SS400) was carried out using thermal spray coating of nickel based self-fluxing alloy under atmospheric conditions for basic data. The size of joining specimen is 50 mm in length and 10 mm in diameter. After the each edged surface of SUS304 and SS400 specimens were blasted by used steel grid material sized No. 70, those were sprayed with self-fluxing alloy (S.F.A.) at the each surface of both specimens coated about 100μm in thickness. The effects of joining conditions on the structure and strength of joining were studied. The results are summarized as follows: (1) The maximum tensile strength at the joint part using R notch specimen was about 579 MPa under condition of 30 sec raising time and 60 sec holding time at 1373 K temperature. (2) The hardness gradient was not observed near the joining zone in the Vickers hardness distribution of the both materials. Furthermore, the Vickers hardness distribution near the joining zone of SUS304 was about Hv120, that was lower than base metal because of the annealing effect. (3) The microstructure near the joining zone did not indicate the martensitic structure, the carburized and the decarburized layer because of its lower cooling rate. The structure near the joining zone of SUS304 was indicated in the annealed twin at the transgranular. (4) By the EPMA line analysis across the joining zone, Cr, Ni, and B were not observed because the inserted material S.F.A. was very little diffused and the most of it was discharged out of the joining part. The elementary analysis of Fe was indicated sligthly concentrated gradient. © 1995, JAPAN WELDING SOCIETY. All rights reserved.
  • 溶射皮膜法による鋳鉄および鋳鉄と炭素鋼の接合
    屋良秀夫; 生田明彦
    高温学会誌 20 (Supplement) 319 - 326 1994/07 [Refereed]
  • 屋良秀夫; 生田明彦
    溶接学会論文集 12 (2) 186 - 191 0288-4771 1994/05 [Refereed]
  • Hideo Yara; Akihiko Ikuta; Koji Kotake; Akihiko Ikuta
    Zairyo-to-Kankyo 43 (11) 648 - 653 1881-9664 1994 
    In order to evaluate the corrosion fatigue characteristics of the structure materials, the fatigue tests should be carried out in environments which closely approximate the actual corrosive environments. In the present work, the fatigue characteristics of the carbon steel (S45C), coated with thermal sprayed zinc and aluminum layers, were investigated during the accelerated corrosion test in which the specimens were subjected to repeated cycles of salt water spraying, drying in a warm air, and exposure in open air at a room temperature. The results are as follows: 1) The surfaces of the turned and blasted specimens are slightly harder due to the hardening effect. 2) In the thermal sprayed and painted specimens, the fatigue limit under the rotate-bending mode is the same as that of the blasted specimen tested in air. 3) The microstructure near the fatigue limit is the mixture of ferrite and pearlite. 4) Dimples and quasi-striation patterns are obseved in the fatigue surfaces. While, tire-track patterns are observed in the fracture surfaces of the turned specimens. © 1994, Japan Society of Corrosion Engineering. All rights reserved.
  • Hideo Yara; Akihiko Ikuta; Koji Kotake; Akihiko Ikuta
    Zairyo-to-Kankyo 43 (11) 648 - 653 1881-9664 1994 [Refereed]
     
    In order to evaluate the corrosion fatigue characteristics of the structure materials, the fatigue tests should be carried out in environments which closely approximate the actual corrosive environments. In the present work, the fatigue characteristics of the carbon steel (S45C), coated with thermal sprayed zinc and aluminum layers, were investigated during the accelerated corrosion test in which the specimens were subjected to repeated cycles of salt water spraying, drying in a warm air, and exposure in open air at a room temperature. The results are as follows: 1) The surfaces of the turned and blasted specimens are slightly harder due to the hardening effect. 2) In the thermal sprayed and painted specimens, the fatigue limit under the rotate-bending mode is the same as that of the blasted specimen tested in air. 3) The microstructure near the fatigue limit is the mixture of ferrite and pearlite. 4) Dimples and quasi-striation patterns are obseved in the fatigue surfaces. While, tire-track patterns are observed in the fracture surfaces of the turned specimens. © 1994, Japan Society of Corrosion Engineering. All rights reserved.
  • 溶射皮膜のすべり摩耗特性
    屋良秀夫; 生田明彦
    琉球大学工学部紀要 45 1 - 11 1993/03
  • Hideo Yara; Akihiko Ikuta; Daisuke Fujiki
    Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society 11 (4) 474 - 478 0288-4771 1993 [Refereed]

Books etc

  • 機械・金属材料学
    黒田大介; 浅田格; 生田明彦; 門井浩太; 兼松秀行; 鎌土重晴; 小林敏郎; 小林正和; 下古谷博司; 二宮隆二; 北條智彦; 松木一弘; 万谷義和; 山崎泰広; 横山誠二; 和田憲幸 (Joint work工具鋼)実教出版(株) 2015/09 9784407337259 311 103-115

Conference Activities & Talks

  • 高炭素鋼切削時における工具すくい面温度の詳細測定  [Not invited]
    生田明彦; 大橋亮介
    日本鉄鋼協会 第186回秋季講演大会  2023/09
  • 塑性流動を用いたリベット型摩擦攪拌点接合による異材接合  [Not invited]
    生田明彦; 植松美彦
    溶接学会秋季全国大会  2023/09
  • 摩擦攪拌接合温度におよぼす接合材料の表面被膜の影響  [Not invited]
    生田明彦
    溶接学会秋季全国大会  2023/09
  • 塑性流動を用いたリベット型摩擦攪拌点接合  [Not invited]
    生田明彦; 植松美彦
    溶接学会春季全国大会  2023/04
  • 炭素鋼旋削におけるコーテッドcBNチップへのレーザピーニング処理効果  [Not invited]
    岡田将人; 加藤将輝; 小林祐次; 斉藤悠太; 萩野将広; 生田明彦
    日本鉄鋼協会 第184回秋季講演大会  2022/09
  • 鉄鋼用摩擦攪拌接合ツール使用時の攪拌領域温度  [Not invited]
    生田明彦; 青木祥宏; 森貞好昭; 藤井英俊
    溶接学会秋季全国大会  2022/09
  • 切削工具を考慮した摩擦攪拌点接合ツールの特徴  [Not invited]
    生田明彦
    精密工学会 第113回難削材加工専門委員会  2022/06
  • W-Mo-Re合金製鉄鋼用摩擦攪拌接合ツールの特徴  [Not invited]
    生田明彦; 青木祥宏; 森貞好昭; 藤井英俊
    溶接学会春季全国大会  2022/04
  • S55C鋼の被削性及び仕上げ面残留応力に及ぼす熱処理の影響  [Not invited]
    竹村明洋; 生田明彦; 萩野将広; 井上孝司; 岡田将人
    2021年度精密工学会切削加工専門委員会・日本鉄鋼協会切削フォーラム合同委員会  2021/12
  • S55Cの被削性に関する研究 -酸化膜が工具寿命にあたえる影響ー  [Not invited]
    萩野将広; 井上孝司; 生田明彦; 岡田将人; 竹村明洋
    2021年度精密工学会切削加工専門委員会・日本鉄鋼協会切削フォーラム合同委員会  2021/12
  • 摩擦攪拌プロセスにより粒子分散強化された表面の切削の特徴  [Not invited]
    生田明彦; 崎野良比呂
    精密工学会秋季大会学術講演会  2021/09
  • S55C鋼の被削性及び仕上げ面残留応力に及ぼす熱処理の影響  [Not invited]
    竹村明洋; 生田明彦; 萩野将広; 井上孝司
    日本鉄鋼協会 第182回秋季講演大会  2021/09
  • 窒化ケイ素製鉄鋼用摩擦攪拌接合ツールの特徴  [Not invited]
    生田明彦; 青木祥宏; 森貞好昭; 藤井英俊
    溶接学会春季全国大会  2021/03
  • 鋳造と摩擦攪拌プロセスを組み合わせた厚板接合方法  [Not invited]
    生田明彦; A. Gerlich; 旗手稔; 信木関
    日本鋳造工学会第176回全国講演大会  2020/12
  • 鋳造と摩擦攪拌プロセスを組み合わせた肉盛方法  [Not invited]
    生田明彦; A. Gerlich; 旗手稔; 信木関
    日本鋳造工学会第176回全国講演大会  2020/12
  • 炭素鋼の黒皮除去における切削特性の不安定性  [Not invited]
    岡田将人; 萩野将広; 竹村明洋; 江村聡; 井上孝司; 生田明彦
    日本鉄鋼協会第180回秋季講演大会  2020/09
  • 超硬合金を用いた鉄鋼用摩擦攪拌接合ツールの特徴  [Not invited]
    生田明彦; 青木祥宏; 森貞好昭; 藤井英俊
    溶接学会秋季全国大会  2020/09
  • 摩擦攪拌プロセス表面切削の特徴  [Not invited]
    生田明彦; 崎野良比呂
    精密工学会秋季大会学術講演会  2020/08
  • 鉄鋼用摩擦攪拌接合ツール形状の提案  [Not invited]
    生田明彦; 青木祥宏; 森貞好昭; 藤井英俊
    溶接学会春季全国大会  2020/04
  • Butt Joints Made Using Friction Stir Welding to Keep up Thickness of Thin Sheet  [Not invited]
    Akihiko Ikuta; Toshimasa Saeki
    溶接学会春季全国大会  2019/04
  • A6061合金摩擦攪拌接合継手の疲労挙動に及ぼすキーホールの影響  [Not invited]
    鳥居駿佑; 柿内利文; 植松美彦; 生田明彦
    日本材料学会東海支部第13回学術講演会  2019/03
  • 摩擦攪拌接合を用いた選択的肉盛法  [Not invited]
    生田明彦
    溶接学会秋季全国大会  2018/09
  • 摩擦攪拌接合における工具形状の影響  [Not invited]
    生田明彦
    精密工学会第102回難削材加工専門委員会  2018/06
  • 摩擦攪拌接合による薄板の突き合わせ接合  [Not invited]
    生田明彦
    溶接学会春季全国大会  2018/04
  • Cutting characteristics of duplex stainless cast steel X2CrNiMoN25-7-3  [Not invited]
    HAGINO Masahiro; TAKEMURA Akihiro; FUJITA Tsuyoshi; USUKI Hiroshi; IKUTA Akihiko
    The 9th International Conference on Leading Edge Manufacturing in 21st Century  2017/11
  • 鉄鋼用摩擦攪拌接合ツールの各部形状の役割  [Not invited]
    生田明彦; 藤井英俊; 村上俊夫
    溶接学会秋季全国大会  2017/09
  • 渦溝ツールを用いた摩擦攪拌プロセスの特徴  [Not invited]
    生田明彦; 植松美彦; 柿内利文
    溶接学会秋季全国大会  2017/09
  • S55Cの被削性に及ぼす組織と加工条件の影響  [Not invited]
    渡里宏二; 今浪祐太; 住田庸; 井上圭介; 藤松威史; 江村聡; 生田明彦; 井上孝司
    日本鉄鋼協会第174回秋季講演大会  2017/09
  • オーステンパ球状黒鉛鋳鉄快削化のための材料選択  [Not invited]
    生田明彦; 旗手稔; 信木関
    日本鉄鋼協会第174回秋季講演大会  2017/09
  • 渦溝ツールの摩擦攪拌プロセスへの適用  [Not invited]
    生田明彦; 植松美彦
    溶接学会春季全国大会  2017/04
  • Production of Cemented Carbide-Alumina Composite Material by Wet-shaping Process  [Not invited]
    IKUTA Akihiko; KYOGOKU Hideki; SUZUKI Hiroyuki
    2016 International Conference on Machining, Materials and Mechanical Technology  2016/10
  • 摩擦攪拌点接合用ツールの摩擦攪拌接合への適用  [Not invited]
    生田明彦; 藤井英俊; 村上俊夫; 小橋泰三
    溶接学会秋季全国大会  2016/09
  • 摩擦攪拌点接合継手の機械的性質におよぼすツール摩耗の影響  [Not invited]
    生田明彦
    溶接学会秋季全国大会  2016/09
  • 接合継手を考慮した切削時の凝着性評価方法  [Invited]
    生田明彦
    精密工学会第95回難削材加工専門委員会  2016/06
  • 摩擦攪拌点接合ツールの機械的摩耗  [Not invited]
    生田明彦
    溶接学会春季全国大会  2016/04
  • 切削工具を考慮した摩擦攪拌点接合ツールの塑性流動  [Not invited]
    生田明彦
    溶接学会秋季全国大会  2015/09
  • 連続鋳造法により作製された鋳鉄を用いたオーステンパ球状黒鉛鋳鉄の切削  [Invited]
    生田明彦
    日本鉄鋼協会創形創質工学部会棒線工学・切削工学フォーラム第40回日本鉄鋼協会切削工学グループ主催講演討論会  2015/06  各務原  日本鉄鋼協会創形創質工学部会棒線工学・切削工学フォーラム
  • 切削工具を考慮した摩擦攪拌点接合ツールの攪拌特性  [Not invited]
    生田明彦; T. H. North
    溶接学会春季全国大会  2015/04  東京  溶接学会
  • オーステンパ球状黒鉛鋳鉄切削時の切削抵抗  [Not invited]
    生田明彦; 旗手稔; 信木関
    日本鋳造工学会第165回全国講演大会  2014/10  北九州  日本鋳造工学会
  • 切削工具を考慮した接合ツールによる摩擦攪拌点接合  [Not invited]
    溶接学会秋季全国大会  2014/09  宇奈月  溶接学会
  • 摩擦攪拌点接合における三角柱型プローブツール付着物の塑性流動  [Not invited]
    溶接学会秋季全国大会  2014/09  宇奈月  溶接学会
  • Production Processes and Characteristics of Porous Alumina  [Not invited]
    IKUTA Akihiko; KYOGOKU Hideki; SUZUKI Hiroyuki
    2014 International Conference on Machining, Materials and Mechanical Technology  2014/09  Taipei
  • 接合ツールの役割に着目した摩擦攪拌点接合技術の開発  [Not invited]
    文部科学省私立大学戦略的研究基盤形成事業プロジェクト研究成果発表会  2014/07  東広島  近畿大学次世代基盤技術研究所
  • ツール設計による FSW特性向上技術の基礎検討  [Not invited]
    革新的新構造材料等技術開発プロジェクト成果報告会  2014/06  軽井沢  新構造材料技術研究組合
  • 摩擦攪拌点接合における三角柱型プローブツール付着物の影響  [Not invited]
    溶接学会春季全国大会  2014/04  東京  溶接学会
  • 湿式プロセスを用いて作製された成形体の多目的利用  [Not invited]
    第8回粉末成形体および焼結材料の寸法形状と構造制御研究分科会  2013/10  広島  日本機械学会 機械材料・材料加工部門
  • レーザ積層造形技術の開発  [Not invited]
    文部科学省私立大学戦略的研究基盤形成事業平成24年度プロジェクト研究成果発表会  2013/09  東広島  近畿大学次世代基盤技術研究所
  • 渦溝ツールを用いた摩擦攪拌点接合時のキーホール消失技術  [Not invited]
    文部科学省私立大学戦略的研究基盤形成事業平成24年度プロジェクト研究成果発表会  2013/09  東広島  近畿大学次世代基盤技術研究所
  • 摩擦攪拌点接合における穴埋めプロセスの条件  [Not invited]
    溶接学会秋季全国大会  2013/09  岡山  溶接学会
  • 摩擦攪拌点接合における穴埋めプロセスの特徴  [Not invited]
    溶接学会秋季全国大会  2013/09  岡山  溶接学会
  • 摩擦攪拌点接合における三角柱型プローブツール寸法の検討  [Not invited]
    溶接学会春季全国大会  2013/04  東京  溶接学会
  • オーステンパ球状黒鉛鋳鉄の切削性におよぼす鋳造方法の影響  [Not invited]
    日本鋳造工学会第154回全国講演大会  2012/10  盛岡  日本鋳造工学会
  • 摩擦攪拌点接合継手におよぼす三角柱型プローブツール寸法の影響  [Not invited]
    生田 明彦; 尹玉環; T. H. North
    溶接学会秋季全国大会  2012/09  奈良  溶接学会秋季全国大会
  • 摩擦攪拌点接合継手の材料流動におよぼす三角柱型プローブツール形状の影響  [Not invited]
    溶接学会春季全国大会  2012/04  大阪  溶接学会
  • 摩擦攪拌点接合継手におよぼす三角柱型プローブツール形状の影響  [Not invited]
    溶接学会春季全国大会  2012/04  大阪  溶接学会
  • Characteristics of Dissimilar Al-alloys Friction Stir Spot Welds Made Using Three-flat Tools  [Not invited]
    Inter-University Research Seminar 2011  2011/08  Toronto
  • Role of Tool Thread in Friction Stir Spot Welding  [Not invited]
    The First East Asia Symposium of Welding and Joining  2011/06  Shanghai
  • 摩擦攪拌点接合におけるツールねじの役割  [Invited]
    摩擦接合技術協会平成22年度第3回研究会  2011/02  大阪  摩擦圧接技術協会
  • Factors Determining Failure Strength Properties of Friction Stir Spot Welds  [Not invited]
    International Conference on Welding and Joining of Materials 2010  2010/08  Lima
  • Direct Selective Laser Melting of Aluminum Alloy  [Not invited]
    2010 International Symposium on Flexible Automation  2010/07  Tokyo
  • Friction Stir Spot Welding of AM60 and AZ31 Mg-alloy Sheets  [Not invited]
    The 3th Inter-University Research Seminar  2010/05  Busan
  • Microstructure and Mechanical Properties of AZ31 Friction Stir Spot Welds  [Not invited]
    The 3th Inter-University Research Seminar  2010/05  Busan
  • 機械的性質および組織を考慮した材料との比較におけるADI材料の切削特性  [Not invited]
    日本鋳造工学会第154回全国講演大会  2009/05  東京  日本鋳造工学会
  • ADI材料の被削性が工具寿命におよぼす影響  [Not invited]
    日本鋳造工学会平成20年度中国四国支部研究発表会  2008/12  広島  日本鋳造工学会中国四国支部
  • ADI材料と他材料との切削現象の比較  [Invited]
    2008/11  広島  精密工学会難削材加工専門委員会
  • ADI材料における切削特性の定量化  [Not invited]
    日本鋳造工学会第153回全国講演大会  2008/10  金沢  日本鋳造工学会
  • 湿式成形法により試作したアルミナ工具の切削特性  [Not invited]
    日本機械学会中国四国支部第46期講演会  2008/03  広島  日本機械学会
  • Examination by Modeling on Cutting Temperature of the Titanium Alloys  [Not invited]
    8th International Conference on Progress of Machining Technology  2006/11  Matsue
  • Examination of Cutting Temperature by Friction Welding Model  [Not invited]
    精密工学会春季大会学術講演会  2006/03  千葉  精密工学会
  • Sintering Properties of Alumina, Alumina-Titanium Carbide and Alumina-Titanium Carbonitride Ceramics  [Not invited]
    日本機械学会中国四国支部第44期講演会  2006/03  広島  日本機械学会
  • Fundamental Examination of Sintering Properties in Alumina Ceramics by the Wet-shaping Process  [Not invited]
    日本機械学会中国四国支部第44期講演会  2006/03  広島  日本機械学会
  • 表面改質層を介した等方性高密度黒鉛の大気中はんだろう付-炭素材料の接合に関する研究（第3報）-  [Not invited]
    溶接学会秋季全国大会  2005/09  福井  溶接学会
  • 超精密旋盤加工銅板の拡散接合における平坦度と継手特性-銅の拡散接合に関する研究（第4報）-  [Not invited]
    溶接学会秋季全国大会  2005/09  福井  溶接学会
  • Heat Conduction Analysis of Cutting Temperature in a Short-time and Micro-area by the FEM  [Not invited]
    日本機械学会中国四国支部第43期講演会  2005/03  松山  日本機械学会
  • ウォータジェットによる炭素材料の溝加工  [Not invited]
    溶接学会秋季全国大会  2004/09  広島  溶接学会
  • SiC系レンガとFe-Ni-Co合金との接合-レンガと金属との接合に関する研究（第1報）-  [Not invited]
    溶接学会秋季全国大会  2004/09  広島  溶接学会
  • Heat Conduction Analysis of Temperature in the Friction Bonding Interface  [Not invited]
    溶接学会秋季全国大会  2004/09  広島  溶接学会
  • 炭素材料の通電加圧ろう付および通電加圧樹脂焼成接合  [Not invited]
    日本溶接協会平成15年度第2回貴金属ろう部会技術委員会先端材料接合委員会  2003/12  東京  日本溶接協会貴金属ろう部会技術委員会先端材料接合委員会
  • Development of the Ceramics Tool Using the Wet-shaping Process（1st Report）  [Not invited]
    精密工学会秋季大会学術講演会  2003/10  富山  精密工学会
  • Bondability of Titanium Alloys to Cemented Carbide Tool During Cutting Process  [Not invited]
    Japan Welding Society7th International Welding Symposium  2001/11  Kobe  Japan Welding Society
  • セラミックス／金属接合体の残留応力解析  [Not invited]
    ANSYS Conference in Japan 2001  2001/11  東京  サイバネットシステム（株）
  • Tool Damage by Adhesion of Difficult-to-Machine Materials During Cutting Process  [Invited]
    精密工学会 2001 年第 2 回切削加工専門委員会 （東京）  2001/07  Tokyo  精密工学会切削加工専門委員会
  • A New Approach to Make the Adhesion Mechanism during Machining of Difficult to Machine Materials (5th Report)  [Not invited]
    精密工学会春季大会学術講演会  2001/03  東京  精密工学会
  • パルス通電加熱ろう付および焼成接合による等方性高密度黒鉛の接合  [Not invited]
    溶接学会秋季全国大会  2000/09  高知  溶接学会
  • 複合材挿入によるAl2O3、Si3N4とSUS304の接合  [Not invited]
    溶接学会秋季全国大会  2000/09  高知  溶接学会
  • Ni基合金の凝着による工具損傷機構−難削材切削時の切削過程における凝着現象の検討（第6報）−  [Not invited]
    溶接学会秋季全国大会  2000/09  高知  溶接学会
  • Ni基合金の凝着と摩擦圧接現象−難削材切削時の切削過程における凝着現象の検討（第5報）−  [Not invited]
    溶接学会秋季全国大会  2000/09  高知  溶接学会
  • 超精密加工銅板の拡散接合率計算の妥当性  [Not invited]
    溶接学会第54回界面接合研究委員会  2000/05  東京  溶接学会界面接合研究委員会
  • Consideration on Adhesion Mechanism of Ti Allays Using Cemented Carbide Tool During Cutting Process  [Not invited]
    International Conference on Precision Engineering 2000  2000/03  Singapore  The Japan Society for Precision Engineering
  • セラミックスと金属の接合継手部の超音波探傷  [Not invited]
    日本機械学会第7回機械材料・材料加工技術講演会  1999/11  広島  日本機械学会
  • Ag，Cu薄膜ろう付とパルス通電加熱接合を併用したSi3N4とSUS304の接合  [Not invited]
    溶接学会秋季全国大会  1999/11  那覇  溶接学会
  • セラミックス／金属接合体における残留応力とセラミックスの割れ  [Not invited]
    日本機械学会第7回機械材料・材料加工技術講演会  1999/11  広島  日本機械学会
  • 難削材切削時の凝着現象に関する基礎的研究（第4報）−各種Ni基合金と超硬合金との切削時における凝着および接合現象−  [Not invited]
    精密工学会秋季大会学術講演会  1999/09  仙台  精密工学会
  • Ｎi基合金の凝着と接合現象 −難削材の切削過程における凝着現象（第4報）−  [Not invited]
    生田 明彦
    溶接学会春季全国大会  1999/04  東京  溶接学会
  • 難削材切削時の凝着現象に関する基礎的研究（第3報）−各種Ti合金と超硬合金との摩擦圧接現象−  [Not invited]
    精密工学会春季大会学術講演会  1999/03  東京  精密工学会
  • 各種Ti合金と超硬工具との摩擦圧接現象 −難削材切削時の切削過程における凝着現象の検討（第3報）−  [Not invited]
    溶接学会秋季全国大会  1998/10  新潟  溶接学会
  • 難削材切削時の凝着現象に関する基礎的研究（第2報）−各種Ti合金と超硬合金との凝着に関する拡散接合による検討−  [Not invited]
    精密工学会秋季大会学術講演会  1998/09  札幌  精密工学会
  • 難削材切削時の凝着現象に関する基礎的研究（第1報）−各種Ti合金の切削における凝着現象と接合現象の関係−  [Not invited]
    精密工学会秋季大会学術講演会  1998/09  札幌  精密工学会
  • W添加9〜11％Cr鋼内圧クリープ試験片溶接部のクリープ損傷要因解析−USCボイラ用フェライト系耐熱鋼の溶接性に関する基礎的研究（第2報）−  [Not invited]
    溶接学会春季全国大会  1998/04  東京  溶接学会
  • W添加9〜11％Cr鋼内圧クリープ試験片溶接部のクリープ損傷要因解析  [Not invited]
    金属材料技術研究所超鉄鋼ワークショップ98'シンポジウム  1998/01  筑波  金属材料技術研究所
  • Fatigue Strength of Partially Thermal Sprayed Materials under Corrosive Enviroment  [Not invited]
    The International Society of Offshore and Polar Engineers  1997/09  The International Society of Offshore and Polar Engineers
  • 鋳造プロセスを利用したクラッド材の接合特性  [Not invited]
    日中溶射学術技術討論会  1995/09  中国  日本溶射協会
  • Study on the Bonding Characteristics of Self-Fluxing Alloys in Spray and Cast Composite Materials  [Not invited]
    High Temperature Society of JapanThe 14th International Thermal Spray Conference  1995/05  Kobe  High Temperature Society of Japan
  • 溶射皮膜を利用した複合材料の接合特性  [Not invited]
    溶接学会秋季全国大会  1994/10  富山  溶接学会
  • 自溶性合金溶射材料によるステンレス鋼と炭素鋼の接合（フレーム溶射に関する研究−第7報−）  [Not invited]
    溶接学会秋季全国大会  1994/10  富山  溶接学会
  • 沖縄本島の水事情とステンレス鋼製貯水用タンクの腐食に関する調査とその研究  [Not invited]
    腐食防食討論会  1993/11  那覇  腐食防食協会
  • 溶射皮膜部をもつ材料の腐食環境下における疲労特性  [Not invited]
    腐食防食討論会  1993/11  那覇  腐食防食協会
  • 自溶性合金溶射材料による異種金属の接合（フレーム溶射に関する研究−第6報−）  [Not invited]
    溶接学会秋季全国大会  1992/10  仙台  溶接学会

MISC

Awards & Honors

  • 2017/04 日本鋳造工学会中四国支部 片島賞
     
    受賞者: 生田 明彦
  • 2016/04 日本鋳造工学会中四国支部 片島賞
     
    受賞者: 生田 明彦
  • 2011/03 溶接学会 溶接技術奨励賞
     
    受賞者: 生田 明彦
  • 2000/03 溶接学会 奨学賞
     JPN
  • 1998/10 精密工学会 秋季大会学術講演会ベストプレゼンテーション賞

Research Grants & Projects

  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2019/04 -2022/03 
    Author : Ikuta Akihiko
     
    This investigation focused on the cutting force and the conditions of the surface after cutting in materials with modified surfaces made using friction stir processing. It compared material with modified surface with dispersed particles, and material with a simply modified surface made using friction stir processing. The results show that the effect of the characteristics of base material is large, and that the machinability of the materials with modified surfaces made using friction stir processing are almost the same when the base material is the same, regardless of whether they are material with a simply modified surface, or a material with a modified surface with dispersed particles.
  • 摩擦攪拌点接合ツールに関する研究
    Date (from‐to) : 2009
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2005 -2006 
    Author : FUKAYA Yasuhiro; HATATE Minoru; IKUTA Akihiko
     
    Carbon materials such as high density graphite, glassy carbon composite, resin sintered graphite are going to apply for separater of Polymer Electrolyte Fuel Cell. But, bonding properties of these materials is very poor. Soft soldering (Sn-Pb) after Cu-Ag-Ti metalizing on carbon materials was studied in this research. Main results obtained are as follows. (1) Void free bonding joint is obtained at high density graphite and resin sintered graphite. But, Cu-Ag-Ti metalizing layer was peeled off at glassy carbon composite. (2) Joint strength (4 point bending strength) equivalent to bending strength of base graphite is obtained at above mentioned two graphites.
  • 日本学術振興会：科学研究費助成事業
    Date (from‐to) : 2003 -2005 
    Author : 生田 明彦
     
    粉末を分散させた低粘度のスラリー(泥漿)を型に装填して静水圧的に加圧して成形するため,緻密な成形体や組成の傾斜化および均一な分散状態を容易に得ることが期待でき,そのプロセス如何で傾斜化が比較的容易に可能と考えられる.この湿式プロセス成形法を用いる本研究では,傾斜化および複合化による高機能セラミックス工具製造技術の確立を研究目的としている.その中で,本年度は以下の点について検討を行った. (1)実際の工具作製に必要と考えられる複合化した場合の基礎的なデータとなる,アルミナ基材の雰囲気中における焼結特性を調査するため,高純度・超微粉末アルミナを使用した場合の大気中および真空中における焼結により,条件を変化させて焼結を行い,密度,破壊靱性値の測定ならびに焼結体組織の観察により最適な焼結条件について調査を行った.その結果,アルミナ基材におよぼす雰囲気の影響はほとんどなく,大気中および真空中いずれであっても,焼結密度99%以上の良好な焼結体の得られることがわかった. (2)実際の工具製作に必要と考えられる組成を持つ,高純度アルミナ+窒化チタンおよび高純度アルミナ+炭化チタンにより複合化させた成形体を得た後,真空中における焼結により,条件を変化させて焼結を行い,密度,破壊靱性値の測定ならびに焼結体組織の観察により最適な焼結条件について調査を行った.その結果,焼結温度1773K,焼結時間5.4ksのような比較的低温,短時間において,相対密度が約91%になることがわかった. これらにより,湿式プロセスを用いた複合傾斜化工具作製プロセスの確立を目指す上で,実際の工具に使用されている組成を用いた場合についても,本法の適用に可能性が示されたものと考えられる.
  • Japan Society for the Promotion of Science：Grants-in-Aid for Scientific Research
    Date (from‐to) : 2001 -2003 
    Author : FUKAYA Yasuhiro; KOBAYASHI Toshirou; IKUTA Akihiko; IHARA Tatsuhiko
     
    Carbon materials such as high density graphite, glassy carbon composite, resin sintered graphite are going to apply for Polymer Electrolyte Fuel Cell. But, Bonding properties of these materials is very poor. Sinter bonding with adhesive resin using direct current heating and pressing was studied in this research. Main results, obtained are as follows : (1)Void free bonding joint is obtaied at above mentioned three carbon materials. (2)Joint strength(4 point bending strength) equivalent to bending strength of base graphite was obtained at high density graphite. It was confirmed that joint strength varied with composition of each layer at glassy carbon composite and bonding temperature at resin sintered graphite. (3)These results were reported at Quar.J.of J.W.S.,Vol22,No1(2004).
  • 難削材の凝着機構に関する研究
  • 難削材切削時の凝着現象の解明
  • 新セラミック工具の開発
  • Research on Adhesion Mechanism of Difficult-to-Machine Materials
  • Clarification of the adhesion mechanism during cutting difficult-to-machining materials
  • Development of the ceramics tools using the new approach processing

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