AbstractLaser powder bed fusion (LPBF), a metal additive manufacturing technique, was conducted on feedstock-modified 316L stainless steel (316L) powder produced by ball-milling of commercial 316L and 1 wt.% additive (Cerium oxide – CeO2, lanthanum (III) nitrate hexahydrate – La(NO3)3.6H2O and chromium nitride – CrN). The feedstock-modified LPBF-316L specimens were sensitized at 675 ? for 24 hours, and the influence of additives on intergranular corrosion (IGC) was investigated following ASTM G108-94 and A262-14 standards. The LPBF-316L with La(NO3)3.6H2O showed higher IGC resistance. The microstructure of the LPBF specimen was investigated and correlated to understand the improved IGC resistance of LPBF-316L with La(NO3)3.6H2O additive.
Published: November 11, 2023