Corrosion performance of feedstock modified – Additively manufactured stainless steel. (December 2022)

• Record Type: Journal Article
• Authors: Vukkum, V.B.; Ozdemir, Furkan; Storck, Steven; Gupta, R.K.
• Is Part Of: Corrosion science. Volume 209(2022)
• Publication Date: 2022-12
• Subjects: Additive manufacturing -- Laser- Powder bed fusion -- Corrosion -- Stainless steel -- Feedstock -- Microstructure; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110724
• Languages: English
• ISSNs: 0010-938X

Abstract

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.