|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Additive Manufacturing: Building the Pathway towards Process and Material Qualification
||Controlling Bulk Residual Stresses in SLM by 3D Laser Shock Peening
||Roland E Loge, Nikola Kalentics, Patrice Peyre, Eric Boillat
|On-Site Speaker (Planned)
||Roland E Loge
A new hybrid additive manufacturing process is introduced, which consists in combining Laser Shock Peening (LSP) with Selective Laser Melting (SLM). LSP is a well-known surface treatment which introduces plastic deformation over a certain penetration depth into the material, which itself leads to Compressive Residual Stresses (CRS).
It is shown that even when starting with Tensile Residual Stresses (TRS) resulting from the SLM process, these can be efficiently converted into CRS by LSP treatment. Furthermore, when applying the LSP treatment every few SLM layers, the magnitude and depth of the CRS increase. These effects are expected to provide significant fatigue life improvement of the part. Finally, the possibility to regulate residual stresses in the bulk of the part, e.g. by reducing TRS to low values, opens the possibility to better control geometrical distortions and/or reduce cracking.
||Planned: Supplemental Proceedings volume