Fatigue and Corrosion Evaluation of L-PBF 316L Stainless Steel Having Undergone a Self-Terminating Etching Process for Surface Finish Improvement.

ABSTRACT: The poor surface finish of as-printed (AP) laser powder bed fusion (L-PBF) 316L stainless steels has detrimental impacts on the resulting fatigue and corrosion performance. One postprocessing method, a self-terminating etching process (STEP), can improve the surface finish of parts up to 76%, but the resulting effects on fatigue life and corrosion reliability remain unknown. This work evaluates the effect of the STEP on the fatigue and corrosion performance of L-PBF 316L. In addition, to determine the influence of changing the microstructures from the as-built condition, specimens having undergone a pre-STEP stress relief (SR + STEP) heat treatment and a pre-STEP solution anneal (SA + STEP) were evaluated. The results showed that a pre-STEP SR resulted in the best Sa roughness, while a pre

SUBMITTER: Prochaska S 

PROVIDER: S-EPMC11443111 | biostudies-literature | 2024 Aug

REPOSITORIES: biostudies-literature