The HiLASE Centre research team, including Sunil Pathak, Sanin Zulić, Ondřej Stránský, Jan Kaufman, Marek Böhm, Jan Brajer and Tomáš Mocek, alongside a colleague from the Institute of Physics of CAS, Jaromír Kopeček, have recently published a research paper in Journal of Materials Research and Technology. Their study has investigated post-processing of selective laser melting manufactured SS-304L by laser shock peening (LSP).
You can read the full article here.
The paper investigates the post-processing of additively manufactured stainless steel (SS) 304 L samples through LSP. Four samples, differently processed, were used to study the effect of LSP at pre-identified parameters to understand the mechanism and behavior of processing different conditions. In addition, compressive residual stresses and surface morphology were considered as a response to measure the effects of LSP on processed samples. The results have shown significant improvements in compressive residual stresses where the values have changed from initial tensile to compressive (−1170 MPa) and remain compressive up to the depth of 1 mm in most cases. The results of this research help better understand the LSP mechanism in the post-processing of AM Parts.