Recovering the ductility of medium-Mn steel by restoring the original microstructure

被引：49
作者：
Jeong, Mun Sik [1 ]
Park, Tak Min [1 ]
Choi, Seunggyu [2 ]
Lee, Seok-Jae [2 ]
Han, Jeongho [1 ]
机构：
[1] Hanyang Univ, Div Mat Sci & Engn, Seoul 04763, South Korea
[2] Jeonbuk Natl Univ, Res Ctr Adv Mat Dev, Div Adv Mat Engn, Jeonju 54896, South Korea
来源：
SCRIPTA MATERIALIA | 2021年 / 190卷 / 190期
关键词：
Medium-Mn steel; Twinning-induced plasticity; Transformation-induced plasticity; Retained austenite; Resetting process; TRANSFORMATION-INDUCED PLASTICITY; RETAINED AUSTENITE; TENSILE PROPERTIES; IMPACT TOUGHNESS; BORON STEEL; MORPHOLOGY; BEHAVIOR;
D O I：
10.1016/j.scriptamat.2020.08.022
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
To recover the reduced ductility of cold-worked medium-Mn steels, a novel resetting process is proposed in this study. Through a simple heat treatment, the original microstructure of the steel is restored by the re-reversion of the Mn-enriched strain-induced martensite. The ductility of the reset steel is successfully recovered, and its strength is improved, relative to the steel prior to cold working. The present technique facilitates the use of a single sheet metal and a simple heat treatment process for an automotive component which originally comprised two different parts to compensate for the opposing attributes that it requires (e.g., having a high strength at the upper part and high toughness at the bottom part of a center pillar). (C) 2020 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：16 / 21
页数：6
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