Post-processing of selective laser melting manufactured SS-304L by laser shock peening

0560496 - FZÚ 2023 RIV BR eng J - Journal Article
Pathak, Sunil - Zulic, Sanin - Kaufman, Jan - Kopeček, Jaromír - Stránský, Ondřej - Böhm, Marek - Brajer, Jan - Beránek, L. - Shukla, A. - Ackermann, M. - Véle, F. - Mocek, Tomáš
Post-processing of selective laser melting manufactured SS-304L by laser shock peening.
Journal of Materials Research and Technology-JMR&T. Roč. 19, Aug (2022), s. 4787-4792. ISSN 2238-7854. E-ISSN 2214-0697
R&D Projects: GA MŠMT(CZ) EF20_079/0017754
Institutional support: RVO:68378271
Keywords : additive manufacturing * residual stresses * laser shock peening * microstructure
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 6.4, year: 2022
Method of publishing: Open access

This paper investigates the post-processing of additively manufactured stainless steel (SS) 304 L samples through laser shock peening (LSP). Four samples, differently processed, (i) as-built (AB), (ii) as-built + annealed, (iii) as-built + polished, and (iv) as-built + annealed + polished, 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.
Permanent Link: https://hdl.handle.net/11104/0333633