Stabilizing austenite via a core-shell structure in the medium Mn steels

被引：57
|
作者：
Wan, Xinhao [1 ]
Liu, Geng [1 ]
Ding, Ran [1 ]
Nakada, Nobuo [2 ]
Chai, Yaw-Wang [2 ]
Yang, Zhigang [1 ]
Zhang, Chi [1 ]
Chen, Hao [1 ]
机构：
[1] Tsinghua Univ, Sch Mat Sci & Engn, Key Lab Adv Mat, Minist Educ, Beijing 100084, Peoples R China
[2] Tokyo Inst Technol, Dept Mat Sci & Engn, Tokyo 2268503, Japan
来源：
SCRIPTA MATERIALIA | 2019年 / 166卷
基金：
国家重点研发计划; 北京市自然科学基金; 中国国家自然科学基金;
关键词：
Steels; Microstructure; Retained austenite; Core-shell structure; MECHANICAL-PROPERTIES; INTERFACE MOBILITY; TENSILE PROPERTIES; TRANSFORMATION; MARTENSITE; BEHAVIOR; MICROSTRUCTURE; REVERSION; STRENGTH; FERRITE;
D O I：
10.1016/j.scriptamat.2019.03.015
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
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.
引用
收藏
页码：68 / 72
页数：5
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