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Dive into the research topics where Koji Yamaguchi is active.

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Featured researches published by Koji Yamaguchi.


Strength, fracture and complexity | 2009

Effects of compressive strain hold on low-cycle fatigue life at elevated temperatures

Kazuo Kobayashi; Masao Hayakawa; Megumi Kimura; Koji Yamaguchi

The effects of compressive strain holding on the high-temperature low-cycle fatigue life of austenitic, martensitic and bainitic steels were investigated. The effects were scarcely observed in austentic steels, but were clearly observed in martensitic and bainitic steels. We conclude that life reduction following compressive strain holding is attributable to oxidation effects and the stress ratio that results from the asymmetric wave shape.


International Journal of Fatigue | 2006

Microstructures of creep-fatigued 9–12% Cr ferritic heat-resisting steels

Megumi Kimura; Koji Yamaguchi; Masao Hayakawa; Kazuo Kobayashi; Kenji Kanazawa


International Journal of Fatigue | 2008

High-temperature fatigue properties of austenitic superalloys 718, A286 and 304L

Kazuo Kobayashi; Koji Yamaguchi; Masao Hayakawa; Megumi Kimura


Materials Letters | 2005

Grain size effect on high-temperature fatigue properties of alloy718

Kazuo Kobayashi; Koji Yamaguchi; Masao Hayakawa; Megumi Kimura


Journal of The Japan Institute of Metals | 1976

Electron Microscope Observation on Deformation Substructure of Type 316 Stainless Steel Low-Cycle Fatigued at Elevated Temperatures

Koji Yamaguchi; Kenji Kanazawa


Journal of The Society of Materials Science, Japan | 2003

Creep and Fatigue Properties of Newly Developed Ferritic Heat-Resisting Steels for Ultra Super Critical (USC) Power Plants

Megumi Kimura; Kazuo Kobayashi; Koji Yamaguchi


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 2004

Microstructure and Grain Boundary Precipitates in 912% Cr Ferritic Heat-resisting Steels

Megumi Kimura; Koji Yamaguchi; Masao Hayakawa; Kazuo Kobayashi


Metallurgical and Materials Transactions A-physical Metallurgy and Materials Science | 2004

Fatigue fracture mechanism maps for a type 304 stainless steel

Megumi Kimura; Koji Yamaguchi; Masao Hayakawa; Kazuo Kobayashi; Etsuo Takeuchi; Saburo Matsuoka


Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 2004

Internal Fracture of Nickel-base Alloy718 in High Temperature Fatigue

Kazuo Kobayashi; Koji Yamaguchi; Masao Hayakawa; Megumi Kimura


Materials Transactions | 2004

Observation of Multi-Scale Structure for a Creep-Fatigued Ferritic 12Cr-2W Steel

Masao Hayakawa; Koji Yamaguchi; Megumi Kimura; Kazuo Kobayashi

Collaboration


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Kazuo Kobayashi

National Institute for Materials Science

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Megumi Kimura

National Institute for Materials Science

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Masao Hayakawa

National Institute for Materials Science

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Etsuo Takeuchi

National Institute for Materials Science

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