Neutron diffraction characterization of strain/stress field of 316L Stainless Steel « walls » made with Wire + Arc Additive Manufacturing te

The studied 316L SS samples were obtained with successive deposition of molten metallic wire using electrical arc generated with a welding process : Gas Metal Arc Welding (GMAW). Such process is called Wire + Arc Additive Manufacturing.The main goal is to measure the residual strain field into the base plate (BP) and overlaid deposits (so the sample). Another objective is to observe the effect of a new deposit on the residual stress field induced by the previous one. These data will help validating the thermo-mechanical simulation and the material behavior law (PhD project of Camille CAMBON Oct.2017 to Sept. 2020). Secondly, we expect to observe a change in the residual stresses of the part when the operating conditions are modified (welding intensity, welding speed, cooling time …) by characterizing two samples built with 2 sets of process parameters (with 5 deposits).