Insights into the high magnetic field-induced austenite formation in medium manganese steel

被引：7

作者：

Zhang, Dong ^{[1
]}

Hou, Tingping ^{[1
]}

Quan, Xueling ^{[1
]}

Zhou, Jie ^{[1
]}

Yin, Chaochao ^{[1
]}

Lin, Hengfu ^{[1
]}

Lu, Zhihong ^{[1
]}

Wu, Kaiming ^{[1
]}

机构：

[1] Wuhan Univ Sci & Technol, Int Res Inst Steel Technol, Collaborat Innovat Ctr Adv Steels, Hubei Prov Key Lab Syst Sci Inmet Proc,State Key L, Wuhan 430081, Peoples R China

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2023年 / 25卷

基金：

中国国家自然科学基金;

关键词：

High magnetic field; Medium manganese steel; Lattice distortion; Austenite; X-RAY-DIFFRACTION; ALLOY CARBIDE PRECIPITATION; DENSITY-FUNCTIONAL THEORY; DISLOCATION DENSITY; CARBON CONTENT; TRANSFORMATION; MARTENSITE; STABILITY; IRON; NUCLEATION;

D O I：

10.1016/j.jmrt.2023.05.189

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The mechanism of austenite formation in medium Mn steel tempered at 700 & DEG;C for 3 h without and with a 12 T magnetic field was investigated. The application of magnetic field results in lattice distortion of the martensite matrix, implying the presence of fewer interstitial carbon atoms embedded in the martensite matrix. The decreased interstitial carbon atoms are either free in the matrix or involved in the formation of nanoscale carbides, both of which prepare for the growth of carbides and the austenite formation. Meanwhile, doping of Mn enables the paramagnetic austenite to undergo a magneto structural coupling transformation (i.e., paramagnetic g-Fe transforms into weakly ferromagnetic g-FeMn). The external field-induced change of the magnetic free energy emphasizes the probability for austenite formation, which agrees well with the experimental results.& COPY; 2023 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

引用

页码：210 / 221

页数：12

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