Dislocation structure and non-proportional hardening of type 304 stainless steel

摘要

This paper describes the microsstructure of Type 304 stainless steel after cyclic loading at room temperature under tension-torsion nonproportional strain paths.The degree of cyclic nonproportional hardening is correlated with changes in the dislocation substructure.Dislocation cells,dislocation bundles,twins and stacking faults are all observed.The type of microstructure formed and resultant stress response is dependent on the degree of nonproportional loading and strain range.Cyclic stress range was uniquely correlated with mean cell size.