Abstract
Continuous and interrupted LCF tests were conducted to reveal the effects of temperature, strain rate and strain amplitude on the LCF behavior of a nitrogen-alloyed 316LN stainless steel. The cyclic hardening and softening behavior at high and low strain amplitudes were elaborately elucidated based on the method of stress decomposition and characterization of dislocation configuration evolution. In addition, the dominant damage mechanism responsible for the different cracking modes under various loading conditions was determined based on the observations of fracture surface and secondary cracks on the longitudinal section.
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