Kazushige Kimura
Toshiba
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Publication
Featured researches published by Kazushige Kimura.
Nuclear Engineering and Design | 1999
Hiroyuki Okamura; Ryuichi Ohtani; Kiyoshi Saito; Kazushige Kimura; Ryuichi Ishii; Kazunari Fujiyama; Shigetada Hongo; Takashi Iseki; Hiroshi Uchida
Abstract In order to develop life assessment techniques for aged components made of modified 9Cr–1Mo steel, specimens were artificially deteriorated by aging, creep and fatigue tests at elevated temperatures, and associated changes in the microstructure and mechanical properties were examined. It was observed that aging resulted in formation of Laves phase causing a decrease in toughness. The creep damage in base metal could be correlated with decrease in hardness, while creep damage in weldments could be correlated with the area fraction and density of creep voids. Creep rupture in weldments occurred in the fine-grained heat affected zone by the formation and growth of creep voids. The fatigue damage in base metal correlated to the maximum length of a crack among micro-cracks initiated during fatigue cycles.
Mechanical Behaviour of Materials VI#R##N#Proceedings of the Sixth International Conference, Kyoto, Japan, 29 July℃2 August 1991 | 1992
Kazunari Fujiyama; Yomei Yoshioka; Nagatoshi Okabe; Kazushige Kimura
ABSTRACT For the purpose of presuming damage and degradation of used gas turbine nozzles, hardness tests, low cycle fatigue tests and fatigue crack propagation tests are conducted on Co-base nozzle superalloy FSX414 thermal aged up to 10, 000 hours. Although hardening occurs due to thermal aging, there is no significant change in fatigue properties. The fatigue crack behavior is attributable to crack propagation morphology and is simulated by fractal geometry model of dendrite structure and random distribution of initial cracks. The multiple crack simulation is proved to be a promising technique for life assessment of nozzles which are used in the crack existing state after inspection and repairment.
Mechanical Behaviour of Materials VI#R##N#Proceedings of the Sixth International Conference, Kyoto, Japan, 29 July℃2 August 1991 | 1992
I. Murakami; Kazunari Fujiyama; Kazushige Kimura
ABSTRACT An expert system has been developed for life assessment and maintenance of steam turbine components which can deal qualitative information in addition to quantitative data through certainty factor combination method and production system. For practical inspection data, we have proved this system to be effective for practical life assessment of steam turbine components.
Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 2002
Ryuichi Ishii; Yoichi Tsuda; Masayuki Yamada; Kazushige Kimura
Archive | 2001
Keiichi Sasaki; Akira Sawada; Yoko Todo; Katsumi Kanehira; Kazushige Kimura; Kenji Adachi; Masaaki Ookubo; Tadayoshi Murayama; Hiromi Imai
Archive | 2001
Katsumi Kanehira; Yoko Todo; Keiichi Sasaki; Akira Sawada; Kenji Adachi; Kazushige Kimura
Isij International | 1990
Kazunari Fujiyama; Kazushige Kimura; Masamitsu Muramatsu; Masayuki Yamada
Tetsu To Hagane-journal of The Iron and Steel Institute of Japan | 2003
Ryuichi Ishii; Yoichi Tsuda; Kazunari Fujiyama; Kazushige Kimura; Kiyoshi Saito
Archive | 1984
Hideaki Takahashi; Tetsuo Shoji; Kiyoshi Saitoh; Masamitsu Muramatsu; Kazushige Kimura
Zairyo-to-kankyo | 2002
Yoko Todo; Katsumi Kanehira; Kazushige Kimura; Juichi Fukakura
