40345 2017 eng lecture 0 -- -- -- Additive manufacturing (AM) by selective laser melting (SLM) offers ample scope for producing geometrically complex parts as compared to the traditional subtractive manufacturing strategies. However, the residual stresses which develop during the process can limit the application of SLM parts because they can reduce the load bearing capacity as well as induce unwanted distortion depending on the boundary conditions specified in manufacturing. This study aims at the characterization of residual stresses in SLM parts by using different measurement techniques. The material used is the nickel based super Alloy 718. Microstructure as well as surface and bulk residual stresses were characterised. For residual stress analysis X-ray, synchrotron and neutron diffraction were applied. The results show different residual stress states dependent on the penetration depth in the sample offered by the different measurement techniques. Samples of Alloy 718 manufactured by SLM process can show high tensile residual stresses in the surface as high as the yield strength of the wrought alloy. Residual stresses in the bulk show considerably lower stress values. Metz, France 17.05.2017 19.05.2017 1st International Congress on Welding, Additive Manufacturing and associated non-destructive testing - ICWAM 0 Arne Kromm eng uncontrolled Additive Manufacturing eng uncontrolled Selective Laser Melting eng uncontrolled Residual stresses Ingenieurwissenschaften und zugeordnete Tätigkeiten Datei im Netzwerk der BAM verfügbar ("Closed Access") Präsentation