Journal
SCRIPTA MATERIALIA
Volume 166, Issue -, Pages 68-72Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2019.03.015
Keywords
Steels; Microstructure; Retained austenite; Core-shell structure
Categories
Funding
- National Natural Science Foundation of China [51771100]
- Beijing Natural Science Foundation [2182024]
- National Key R&D program of China [2016YFB0300104]
- National Young 1000-Talents Program [D1101073]
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Retained austenite plays a significant role in the strength-ductility balance of medium Mn steels. In this contribution, a new processing route (Flash-Austenite Reversion Treatment, Flash-ART) was proposed to design retained austenite with a compositional core-shell structure in an Fe-0.20C-7.76Mn-1.99Al (wt%) steel. It was interestingly found that the austenite core, which should transform into martensite based on its composition and size, was stabilized by the Mn enriched shell. Flash-ART allows us to obtain more retained austenite compared with the conventional ART. (C) 2019 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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