Length scale of residual stresses in 316L austenitic stainless steel components manufactured by laser based powder bed fusion
Recent advances in additive manufacturing have pushed the boundaries in the design and functionality of engineering parts. Especially the Laser based Powder Bed Fusion (L-PBF) process has enabled incredible weight and resources savings through organic designs and showed the potential to match or even exceed mechanical properties of conventionally manufactured components. Nonetheless, the formation of Residual Stress (RS) in L-PBF seems to be inherent and is highly depending on the multitude of process parameters as widely reported in literature. The proposed experiment design aims at determining the RS distribution solely as a function of geometrical changes to understand the length-scale of RS formation. Therefore, a set of 316L austenitic stainless-steel samples with changes in thickness and width were manufactured with identical process parameters by L-PBF. The Neutron diffraction results will complement x-ray diffraction measurements and the resulting high-density RS distribution will be used for modelling eigenstrains (inelastic strain) as the underlying source of RS. Furthermore, the neutron diffraction measurements will be compared with contour method results.
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SPRENGEL Maximilian; BRUNO Giovanni; CABEZA Sandra; EVANS Alexander; KROMM Arne and PIRLING Thilo. (2020). Length scale of residual stresses in 316L austenitic stainless steel components manufactured by laser based powder bed fusion. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-02-288
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