Supreme tensile properties in precipitation-hardened 316L stainless steel fabricated through powder cold-consolidation and annealing
SCIE
SCOPUS
- Title
- Supreme tensile properties in precipitation-hardened 316L stainless steel fabricated through powder cold-consolidation and annealing
- Authors
- Lee, Do Won; Asghari-Rad, Peyman; HEO, YOON UK; Son, Sujung; Park, Hyojin; Lee, Ji-Su; Jang, Jae-il; LEE, BYEONG JOO; KIM, HYOUNG SEOP
- Date Issued
- 2024-02
- Publisher
- Elsevier BV
- Abstract
- One of the key goals of processing 316L stainless steel by powder metallurgy (PM) techniques is to achieve industrial-viable tensile properties without structural defects like poor densification, undesired phase transitions, and oxidation during high-temperature sintering. To address this, this study adopts high-pressure torsion to fabricate a fully dense structure at ambient temperature through cold consolidation. The samples fabricated by the present PM-based technique exhibits considerably enhanced tensile properties compared to counterparts processed by conventional PM techniques, with a remarkable yield strength of 1 GPa and total elongation of 46%. Additionally, the segregation of certain elements during subsequent annealing results in a unique microstructure with nano-scale sigma precipitates which induces dislocation pile-up, leading to improved yield strength and retarded dislocation motion. The results indicate that the present PM-based route is an applicable technique to achieve the strength-ductility synergy in 316L stainless steel. © 2024 Elsevier B.V.
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/120454
- DOI
- 10.1016/j.msea.2024.146107
- ISSN
- 0921-5093
- Article Type
- Article
- Citation
- Materials Science and Engineering: A, vol. 893, page. 146107, 2024-02
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