Nanomechanical and microstructural characterization on the synergetic strengthening in selectively laser melted austenitic stainless steel

[Display omitted] 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 stre...

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Published in:Scripta materialia 2022-03, Vol.209, p.114359, Article 114359
Main Authors: Lee, Dong-Hyun, Gao, Zhe, Park, Jeong-Min, Zhao, Yakai, Suh, Jin-Yoo, Jägle, Eric A., Tsuchiya, Koichi, Ramamurty, Upadrasta, Jang, Jae-il
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Language:English
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Additive manufacturing
Austenitic stainless steel
High-pressure torsion
Martensitic transformation
Nanoindentation
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container_title Scripta materialia
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creator Lee, Dong-Hyun
Gao, Zhe
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Jang, Jae-il
description [Display omitted] 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.
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subjects Additive manufacturing
Austenitic stainless steel
High-pressure torsion
Martensitic transformation
Nanoindentation
title Nanomechanical and microstructural characterization on the synergetic strengthening in selectively laser melted austenitic stainless steel
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