Research field (1)：
Material fabrication and microstructure control
Research keywords (7)：
friction stir welding (FSW)
, electron back scatter diffraction (EBSD) analysis
, titanium
, aluminum alloy
, Joining
, crystallographic orientation
, microstructural control
Research theme for competitive and other funds (7)：
2017 - 2020 Detection of stir zone and elucidation of bonding mechanism in friction stir diffusion bonding of dissimilar metallic foils
2007 - 2008 Fabrication of plastically-workable honeycomb structural material by using Friction stir welding
2004 - 2006 チタン表面層ナノ・配向制御による光機能性表面の創製
2000 - 2001 Sharpening of Cube Texture during Continuous Cyclic Bending Process in Aluminum-Magnesium base alloy
1996 - 1998 Nanostructure control
1989 - 1989 鉄の2次再結晶と結晶粒度分布との関係
1987 - 1987 金属の結晶粒度分布の評価法に関する研究
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Papers (17)：
Yoshimasa Takayama, Tatsumi Tozawa, Hajime Kato, Norio Furushiro, Shigenori Hori. ESTIMATION OF THE THREE-DIMENSIONAL GRAIN SIZE DISTRIBUTION FROM MEASUREMENTS OF LINEAR INTERCEPT LENGTH DISTRIBUTION. Nippon Kinzoku Gakkai-si. 2022. 51. 10. 907-910
Yoshimasa Takayama, Tatsumi Tozawa, Hajime Kato, Yuichi Ushiroda. Quantitative metallography for computer simulation of abnormal grain growth in three dimensions. Nippon Kinzoku Gakkaishi/Journal of the Japan Institute of Metals. 2022. 59. 10. 1006-1012
Yoshimasa Takayama, Tatsumi Tozawa, Hajime Kato, Norio Furushiro, Shigenori Hori. Influence of grain size distribution on estimation of mean grain size. Nippon Kinzoku Gakkai-si. 2022. 52. 9. 835-842
Yoshimasa Takayama, Tatsumi Tozawa, Hajime Kato. LINEAR INTERCEPT LENGTH DISTRIBUTION IN A GRAIN STRUCTURE MODEL WITH DIAMETER DISTRIBUTION OF LOG-NORMAL FORM. Transactions of the Japan Institute of Metals. 2022. 28. 8. 631-643
Ryunosuke Sato, Tatsumi Tozawa, Hajime Kato, Yoshimasa Takayama, Tomoyuki Yokobayashi. Surface fatigue crack propagation of Al-Mg alloy sheets with a surface artificial defect in 3 mass% NaCl aqueous solution. Keikinzoku/Journal of Japan Institute of Light Metals. 2022. 48. 7. 307-311
