Stable and Unstable Fatigue Crack Propagation During High Temperature Creep-Fatigue in Austenitic Steels: The Role of Precipitation

[+] Author and Article Information
G. J. Lloyd

UKAEA, Risley Nuclear Power Development Laboratories, Warrington, Cheshire, England

J. Wareing

UKAEA, Springfields Nuclear Power Development Laboratories, Preston, Lancashire, England

J. Eng. Mater. Technol 101(3), 275-283 (Jul 01, 1979) (9 pages) doi:10.1115/1.3443688 History: Received March 30, 1978; Online August 17, 2010


The distinction between stable and unstable fatigue crack propagation during high temperature creep-fatigue in austenitic stainless steels is introduced. The transition from one class of behavior to the other is related to the precipitate distribution and to the nature of the prevailing crack path. It is shown by reference to new studies and examples drawn from the literature that this behavior is common to both high strain and predominantly elastic fatigue in austenitic stainless steels. The relevance of this distinction to a mechanistic approach to high temperature plant design is discussed.

Copyright © 1979 by ASME
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