On the thermal and mechanical stability of reverted austenite by intercritical tempering

被引：8
作者：
Han, G. [1 ,3 ]
Shang, C. J. [1 ,2 ]
Xie, Z. J. [1 ]
Misra, R. D. K. [4 ]
Wang, J. L. [1 ]
机构：
[1] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Adv Steel Technol, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Yantai Inst Ind Technol, Yantai, Shandong, Peoples R China
[3] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
[4] Univ Texas El Paso, Dept Met Mat & Biomed Engn, Lab Excellence Adv Steel Res, El Paso, TX 79968 USA
来源：
MATERIALS LETTERS | 2021年 / 291卷
基金：
中国国家自然科学基金;
关键词：
Microstructure; Phase transformation; Reverted austenite; Paramagnetism; Magnetic moment;
D O I：
10.1016/j.matlet.2021.129457
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The study provides new sights on thermal and mechanical stability of reverted austenite, which interestingly were modulated by intercritical heat treatment in a low alloy low carbon steel. Thermal and mechanical stability of reverted austenite was strongly governed by the intercritical tempering temperature during the second step of heat treatment and decreased with the increase of temperature. Hollomon analysis indicated that reverted austenite grains experienced martensitic transformation and the tensile strength was significantly enhanced. Furthermore, thermal stability studied by low temperature magnetic experiments suggested that M-s and M-f of reverted austenite generated by intercritical tempering at 720 degrees C were -97.5 degrees C and -120.5 degrees C respectively, and the transformation product was twinned martensite. (C) 2021 Elsevier B.V. All rights reserved.
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页数：4
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