期刊
SCRIPTA MATERIALIA
卷 209, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2021.114359
关键词
Additive manufacturing; Austenitic stainless steel; High-pressure torsion; Nanoindentation; Martensitic transformation
类别
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2021R1F1A1048393]
- NRF [2020R1A2B5B01001446, 2020R1A5A6017701]
- Agency for Science, Technology and Research (A* STAR) of Singapore [A18B1b0061]
- Deutsche Forschungsgemeinschaft (DFG) [JA2482/3-2]
- MEXT, Japan [18H05451]
- National Research Foundation of Korea [2021R1F1A1048393, 2020R1A2B5B01001446] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- Grants-in-Aid for Scientific Research [18H05451] Funding Source: KAKEN
The significant strengthening of SLM 304L stainless steel after high-pressure torsion treatment is mainly attributed to the synergistic combination of grain refinement and martensitic transformation. In the nanocrystalline regime, the dominance of grain boundary-mediated plasticity retards martensite-induced hardening.
The significant strengthening of selectively laser melted (SLM) 304L stainless steel that occurs due to high-pressure torsion (HPT) is examined by recourse to detailed nanomechanical and microstructural characterization. In the as-built alloy, dislocation hardening is the main strengthening mechanism. After HPT, however, the synergistic combination grain refinement and martensitic transformation dominate the strength of the alloy. In the nanocrystalline regime, the dominance of the grain boundary-mediated plasticity retards the martensite-induced hardening. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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