Kale, Amol B. Kim, Byung-Kyu Kim, Dong-Ik Castle, E. G. Reece, M. Choi, Shi-Hoon 2024-01-19T17:33:56Z 2024-01-19T17:33:56Z 2021-09-04 2020-05 1044-5803 https://pubs.kist.re.kr/handle/201004/118699 The microstructure and corrosion characteristics of 316L stainless steel specimens fabricated by spark plasma sintering (SPS) and selective laser melting (SLM) techniques were investigated. SPS specimens have a relatively low density compared with SLM specimens. Microstructural analysis showed that SPS specimens consisted of fully and partially sintered regions and contained initial pores, which are located at the powder boundaries (PBs). SPS specimens have relatively low density and high kernel average misorientation (KAM) values near the interface of the pores and the matrix. In the case of SLM specimens, the scanning strategy did not affect the spatial distribution of the KAM, while it affected the extent of surface defects. Electrochemical analysis revealed that the corrosion behavior of SPS specimens was similar to localized corrosion, and weak levels of passive protection were observed in the anodic response curves due to the initial surface pores. SLM specimens with well-connected scan tracks showed passivation behavior similar to that of as-rolled specimens. Moreover, due to a homogeneous microstructure distribution and lower porosity, in NaCl solutions the SLM specimens showed corrosion performance that was significantly enhanced compared with that of SPS specimens. Cross-sectional analysis of corroded SPS specimens revealed that the configuration and connectivity of pores (or small cavity) affected the morphology of open spaces under the corroded surface. English ELSEVIER SCIENCE INC MECHANICAL-PROPERTIES FUNCTIONAL-PROPERTIES POWDER-METALLURGY PITTING CORROSION HEAT-TREATMENT LASER GROWTH ALLOY MICROSTRUCTURE PASSIVATION An investigation of the corrosion behavior of 316L stainless steel fabricated by SLM and SPS techniques Article 10.1016/j.matchar.2020.110204 1 MATERIALS CHARACTERIZATION, v.163 MATERIALS CHARACTERIZATION 163 scie scopus 000551341700025 2-s2.0-85081026048 Materials Science, Multidisciplinary Metallurgy & Metallurgical Engineering Materials Science, Characterization & Testing Materials Science Metallurgy & Metallurgical Engineering Article MECHANICAL-PROPERTIES FUNCTIONAL-PROPERTIES POWDER-METALLURGY PITTING CORROSION HEAT-TREATMENT LASER GROWTH ALLOY MICROSTRUCTURE PASSIVATION 316L SLM SPS Corrosion Microstructure Pores