Dynamic Observation of Localization and Propagation of TRIP in tensile test on SUS304

Abstract

Dynamic processes in tensile tests of SUS304 specimen were observed by dynamic ESPI that enables us to investigate the entire process of whole-field deformation. In later process of a plastic deformation state, we found that strain-localized band revealed by concentrated correlation fringes swept over the specimen repeatedly. Correspondingly, on the stress-strain curve, serrated variations took place. This phenomenon will be discussed associated strain-induced martensitic transformation.