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RESEARCH PAPERS

Notch Effect in Low-Cycle Fatigue at Elevated Temperatures—Life Prediction From Crack Initiation and Propagation Considerations

[+] Author and Article Information
Masao Sakane, Masateru Ohnami

Ritsumeikan University, 56-1 Tojiin Kita-machi, Kita-ku Kyoto, 603, Japan

J. Eng. Mater. Technol 108(4), 279-284 (Oct 01, 1986) (6 pages) doi:10.1115/1.3225883 History: Received October 30, 1984; Online September 15, 2009

Abstract

This paper describes the notch effect in low-cycle fatigue of an austenitic stainless steel SUS 304 at 873 K in air. Total strain range-controlled tests were carried out using a round unnotched and three round notched specimens. A prediction method for low-cycle fatigue lives of notched specimens was developed by predicting the crack initiation and propagation periods separately. To predict the former Neuber’s rule was applied and a nominal stress/strain criterion was developed to predict the latter. Failure lives, obtained by adding the two prediction lives, closely agree with observed failure lives.

Copyright © 1986 by ASME
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