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

Article type: Research Article

Authors: Kobayashi, Kazuo | Hayakawa, Masao | Kimura, Megumi | Yamaguchi, Koji

Affiliations: National Institute for Materials Science (NIMS), Tsukuba, Japan

Note: [] Address for correspondence: Kazuo Kobayashi, National Institute for Materials Science (NIMS), 1-2-1, Sengen, Tsukuba 305-0047, Japan. Tel.: +81 29 859 2248; Fax: +81 29 859 2201; E-mail: KOBAYASHI.Kazuo@nims.go.jp.

Abstract: 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.

Keywords: Creep-fatigue, low-cycle, austenite, martensite, bainite, elevated temperature

DOI: 10.3233/SFC-2009-0093

Journal: Strength, Fracture and Complexity, vol. 5, no. 2-3, pp. 89-96, 2009