Abstract
In order to examine the applicability of the proposed fatigue life prediction model under variable straining, PP type High-Low and Low-High tests were conducted for the as solution-treated SUS304 at 700, 800°C and for the thermally aged SUS304 at 700°C in air. It was found that the experimental results for the as solution-treated material at 800°C and for the aged material at 700°C were well explained by the proposed model. On the other hand, in the case of the as solution-treated material at 700°C the deviation from the proposed model was observed in some testing condition. By comparing the cyclic hardening behavior under each testing condition, it was supposed that the discrepancy from the proposed model prediction was caused by the influence of the cyclic hardening during the primary straining on the inelastic strain range of the secondary straining.
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