Corrosion performance of feedstock modified – Additively manufactured stainless steel. (December 2022) - Vukkum, V.B.
Abstract: Feedstock modified powders were produced by ball-milling commercial 316 L stainless steel powder and 1 wt% additive (Cerium oxide–CeO2, lanthanum (III) nitrate hexahydrate–La(NO3 )3 0.6 H2 O and chromium nitride–CrN). Laser-powder bed fusion (L -PBF) was performed on modified feedstock using 180, 200, and 220 W laser power. The influence of additives on microstructure and corrosion performance was investigated on the as-printed and ground/polished conditions of L -PBF-316 L -additive. The corrosion performance was dependent on the type of the additives. The microstructure of the alloys was correlated with the observed corrosion behavior. Highlights: Feedstock modification of 316 L SS with 1 wt% CeO2, La(NO3 )3 0.6 H2 O and CrN additives. Laser Powder bed fusion of feedstock modified 316 L Stainless Steel powder. Effect of additives on surface roughness and porosity as a function of laser power. Influence of additives on microstructure and corrosion performance of L -PBF-316 L. Corrosion mechanism of L -PBF-316 L -additive concerning the respective microstructure.