Determination of Residual Stresses after Tensile Tests and Deep Drawing of Unstable Austenitic Steel

M. Reda Berrahmoune; Sophie Berveiller; Karim Inal; Etienne Patoor; Christian R. Simon; Jean-Christophe  Glez

doi:10.4028/www.scientific.net/MSF.490-491.690

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XRD Stress Analysis in a TiAl Based Intermetallic Multicrystal
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Determination of Residual Stresses after Tensile Tests and Deep Drawing of Unstable Austenitic Steel
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Determination of Residual Stresses after Tensile Tests and Deep Drawing of Unstable Austenitic Steel

Abstract:

The main objective of this work is to contribute to the study of the 301LN unstable austenitic stainless steel by determining the distribution of residual stresses after deep drawing, taking into account the phase transformation. In the first part, kinetics of martensitic transformation are determined for uniaxial loading. Tensile tests are performed at different pre-strains at room temperature for two different strain rates. The austenite/martensite content is measured by X-ray diffraction and is coupled with the determination of residual stresses distribution. In addition, to establish a relation between the complex loading path effect and the residual stresses state, deep drawing are done for different drawing ratios for two different temperatures. Macroscopic tangential residual stresses are determined by the separation technique. It appears that the residual stresses increase with increasing drawing ratios and the maximum value is located at middle height of the cup.