EPJ Web of Conferences
Volume 6, 2010ICEM 14 – 14th International Conference on Experimental Mechanics
|Number of page(s)||8|
|Section||Applications of Optical Methods|
|Published online||10 June 2010|
Localization phenomenon investigation on Smated stainless samples by speckle interferometry
LASMIS, Institut Charles Delaunay, UMR CNRS 6279
Universit y of Techno logy of Troyes, 10010 Troyes, FRANCE
In-plane Electronic Speckle Pattern Interferometry (ESPI) has been successfull y 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 depends on treatments undergone by the material. In this paper, a comparison was performed about the heterogeneity initiation of specimens SMATed during 30 minutes with 2 mm shot, 3 mm shot and a non-treated sample. The formation of the two slip band system until fracture of the tensile specimen was also studied.
© Owned by the authors, published by EDP Sciences, 2010
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