|About this Abstract
||Materials Science & Technology 2019
||Corrosion of Additively Manufactured Metals
||Effect of Chloride and Heat Treatment on Pitting Corrosion Resistance and Mechanical Properties of a 316L Stainless Steel Manufactured by the Direct Metal Laser Sintering (DMLS) Process
||Claudia Prieto, David Young, Marc Singer
|On-Site Speaker (Planned)
A 316L stainless steel, manufactured by direct metal laser sintering (DMLS), was electrochemically characterized by performing anodic potentiodynamic polarization (ASTM G5) and the ferric chloride pitting corrosion resistance test (ASTM G48). A 316L cold-rolled stainless steel was used as the reference material. Regarding potentiodynamic polarization, the pitting potential of the 316L SS was affected in the same fashion as its counterpart (316L SS cold-rolled). For the ferric chloride test, the 316L SS DMLS exhibited preferential corrosion through inherent microstructural defects (scan tracks). As a proposed solution to heal the scan tracks, some specimens were subjected to an argon-quenched heat treatment to eliminate such defects. As a result, the general corrosion resistance of the specimens was enhanced, as determined by the ferric chloride test, with no effects in the pitting corrosion potential. Nevertheless, nanoindentation characterization of the specimens indicated a diminution of the hardness and Young’s moduli of the heat-treated specimens.
||Definite: At-meeting proceedings