On the Dynamic Strain Aging Effects during Elevated Temperature Ratcheting of Type 316LN Stainless Steel

Abstract

AbstractRatcheting experiments were carried out on type 316LN stainless steel (SS) at different temperatures in the range, 300–923 K using different mean stress (σm) – stress amplitude (σa) combinations. Occurrence of dynamic strain aging (DSA) in the intermediate temperature range led to an anomalous temperature dependence of ratcheting strain accumulation. While the peak DSA temperature was found to be 823 K for all mean stress-stress amplitude combinations, the temperature regime of occurrence of DSA was found to depend on the σm–σa combinations used.