豊橋技術科学大学

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Yasui, Toshiaki

Affiliation Department of Mechanical Engineering
Title Associate Professor
Fields of Research Joining Process / Plasma Processing / Surface Modification
Degree Dr. Engineering (Osaka University)
Academic Societies Japan Welding Society / Japan Thermal Spraying Society / The Japan Society of Applied Physics / The Vacuum Society of Japan / The Japan Society of Mechanical Engineering / The Institute of Electrical Engineers of Japan / The Japan Institute of Metals an
E-mail yasui@
Please append "tut.jp" to the end of the address above.
Laboratory website URL http://isf.me.tut.ac.jp/index.html
Researcher information URL(researchmap) Researcher information

Research

1)Welding between dissimilar materials by friction stirring
2)Atmospheric pressure plasma spray using low power microwave plasma
3)Effect of discharge structure on microstructure of coating by plasma electrolytic oxidation



Theme1:Welding between dissimilar materials by friction stirring

Overview
Friction stir welding of aluminum alloy and steel

Friction stir welding (FSW) is a solid state welding technique which is highly effective for aluminum welding. The laboratory established the principle for friction stir welding between aluminum and steel with high weld strength. This is attributed to the suppression of reaction layer growth in the weld interface by low heat input during welding. The laboratory aspires to expand the range of application as three-dimensional structure joints and dissimilar materials welding (aluminum/plastics, aluminum/ceramics) through clarifying the welding mechanism.

Selected publications and works

1) Y. Liu, et al., "Friction stir lap welding between A6061/SPC270 thin sheets using welding tool with scroll shoulder," Quarterly Journal of the Japan Welding Society 41(2023) 79-89.
2) T.Yasui, et al., " Effect of Tilt Angle and Plunge Depth of Welding Tool on Friction Stir Lap Welding of Steel Sheet and Aluminum Alloy Sheet," Tetsu-to-Hagane 108(2022) 979-990.
3) T.Yasui, et al., "Friction Stir Welding between Steel and Aluminum," Journal of The Surface Finishing Society of Japan 72(2021) 649-653.
4) T.Yasui, et al., " Friction stir welding between aluminum and dissimilar metal,"Journal of Japan Institute of Light Metals 71(2021) 222-227.
5) T.Yasui, et al., "Formation Mechanism of Weld Interface by Friction Stir Butt Welding between A6061 and S45C," Journal of Light Metal Welding 58(2020)382-391.
6) M.Okane, T.Shimizu, T.Yasui, and M. Fukumoto, "Mechanistic Factors Infuencing Fatigue Behavior of the A5052/SPC270C Joints by Friction Stir Spot Welding," Journal of Light Metal Welding 56(2018) 61 - 69.
7) 安井, "摩擦攪拌接合による異種金属の接合メカニズムとその可視化技術," 異種材料の接着・接合技術とマルチマテリアル化 第16章第2節 , 技術情報協会 2017年10月 (ISBN: 9784861046827)
8) T.Yasui, et al., "Material flow observation for dissimilar friction stir welding of aluminum alloy and steel by X-ray CT method," Journal of Japan Institute of Light Metals 64(2014) 604-610.
9) T.Yasui, et al., "Effect of weld line shape on material flow during friction stir welding of aluminum and steel,"
IOP Conf. Series: Materials Science and Engineering 61(2014) 012009.
10) T.Yasui, et al., "Microstructure Observation of Weld Interface between 6063 Al alloy and S45C Carbon Steel by Means of Friction Stirring -Study on Welding in Dissimilar Metals by Means of Friction Stirring (2nd Report)-," Quarterly Journal of the Japan Welding Society 25(2007) 426-430.
11) 異種金属材の摩擦撹拌接合方法 特開2004-255420.

Keywords

friction stir welding, FSW, dissimilar welding

Theme2:Atmospheric pressure plasma spray using low power microwave plasma

Overview
Atmospheric Pressure Microwave Plasma Spray

Atmospheric pressure plasma spray using low power microwave plasma

Selected publications and works

1) T,Yasui, "Low Power Atmospheric Pressure Microwave Plasma Spray for Deposition of Metal and Ceramics on Resin Substrate," Function & Materials 2022-10, CMC Publishing (2022).
2) T. Yasui, et al., "In-flight Behavior and Deposition Mechanism of Copper Coating on Polyacetal Resin Substrate," Journal of Thermal Spray Technology 29(2019) 232 - 240.
3) 安井利明他, "大気圧マイクロ波プラズマの溶射プロセスへの応用について," 日本機械学会第20回機械材料・材料加工技術講演会(M&P2012)(2012) CD.
4) T. Yasui, et al., "Application of Atmospheric Pressure Microwave Discharge to Plasma Spray," Industrial Application of Plasma Process 2(2009) 1-7.
5) マイクロ波プラズマ発生法、およびマイクロ波プラズマ溶射装置, 特開2007-002273.

Keywords

atmospheric pressure plasma spray (APS), atmospheric pressure plasma, microwave plasma, low power plasma spray

Theme3:Effect of discharge structure on microstructure of coating by plasma electrolytic oxidation

Selected publications and works

1) T.Yasui et al., "Behaviors of Micro-Arcs, Bubbles, and Coating Growth during Plasma Electrolytic Oxidation of β-Titanium Alloy," Materials 16(2022) 360-360.
2) R.Nishikawa, et al., "Influence of Micro-arc and Bubble on Film Formation by Plasma Electrolytic Oxidation," Proc. of 5th International Conference on Plasma Nanotechnology and Science, (2012) P-15.
3) 廣永光希 他, "プラズマ電解酸化法により形成される酸化アルミニウム皮膜構造と成膜プロセスの調査," 日本機械学会機械材料・材料加工技術講演会(M&P2013) (2013) CD.
4) 安井利明 他, "顕微観察によるプラズマ電解酸化プロセスの解明," 日本溶接協会平成25年度第1回表面改質技術研究委員会 (2013).

Keywords

plasma electrolytic oxidation (PEO), micro-arc,

Title of class

Descriptive Geometry / Engineering and Science Laboratory / Research Project / Materials and Processing in Mechanical Engineering / Physical Chemistry of Materials / Bonding Technology / Seminar in Mechanical Engineering / Supervised Research / Advanced Surface Modification Engineering / Seminar in Mechanical Engineering 1 / Seminar in Mechanical Engineering 2 / Supervised Research in Mechanical Engineering / Advanced Manufacturing Processes


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