Abstract:Abstract. In-plane Electronic Speckle Pattern Interferometry (ESPI) has been successfully used during tensile tests on SMA-treated (Surface Mechanical Attrition Treatment) and as received 316L stainless steel in order to measure the strain rate field. The heterogeneity in the strain rate field can be observed from a stage of deformation which doesn't coincide with the classic Considère's criterion (dF=0) for the diffuse neck initiation (or plastic instability). The initiation of this heterogeneity strongly dep… Show more
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