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

页码：68 / 72

页数：5

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