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Abstract

The paper reviews the first stages of the fatigue life of austenitic engineering alloys up to and including the stage of crack initiation, with particular emphasis on the behaviour at intermediate and at elevated temperatures. With increasing temperature and decreasing strain rate the mode of deformation changes from glide in planar slip bands, to thermally activated, homogeneous, dislocation movement. Simultaneously the microstructure tends to thermodynamically more stable conditions. Both processes affect the dislocation microstructure and the cyclic response of the material, as well as the modes and mechanisms of crack initiation.

Additional information

Authors: BRESSERS J JRC PETTEN ESTAB. (THE NETHERLANDS), JRC PETTEN ESTAB. (THE NETHERLANDS)
Bibliographic Reference: HIGH-TEMPERATURE MATERIALS - THEIR EXPLOITABLE POTENTIAL, PETTEN (THE NETHERLANDS), OCT. 25-27, 1985 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 32628 ORA
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