Residual stress mapping in 316L L-PBF samples

The proposed experiments aim to investigate the residual stress genesis in 316L L-PBF samples. The residual stress state developed in this type of parts is inhomogeneous and depend on the process parameters. Therefore, accurate prediction and measurement are critical to ameliorate the uptake and viability of this manufacturing technique. Until now days, several studies are still conducted in order to assess the extent of the parameter process and post treatment on the residual stress genesis in L-PBF manufactured parts. Almost of the studies are conducted on parts with relatively simple geometries. For real applications, more complex geometries are produced. An inhomogeneous triaxial residual stress state can be generated in the part accompanied with a gradient evolution going from the bulk to the free surface. In this project, a geometry closer to industrial case was produced. The effect of the used process parameters and post treatment on the residual stress will be investigated.