A Study on the Notch Effect on the Low Cycle Fatigue of Metals in Creep-Fatigue Interacting Conditions at Elevated Temperature

[+] Author and Article Information
M. Sakane, M. Ohnami

Ritsumeikan University, Kita-ku, Kyoto, 603 Japan

J. Eng. Mater. Technol 105(2), 75-80 (Apr 01, 1983) (6 pages) doi:10.1115/1.3225629 History: Received September 01, 1981; Online September 15, 2009


Frequency and hold-time effects on fatigue lives of cylindrical notched specimens of SUS 316 stainless steel were studied at 600° C in air. From the tests, the following conclusions were obtained: Neuber’s rule, as used in the ASME N-47 Code, predicts very conservatively the life of notched specimens in tests without a hold-time. But it gives a nonconservative estimate for the reduction in the life of the material by the introduction of a hold-time. An empirical formula of a “frequency-elastic stress concentration factor modified equation” was obtained by analysing the experimental data. It predicts accurately the life of the notched specimen tested at different frequencies.

Copyright © 1983 by ASME
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