ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Effects of High Magnetic Field on Microstructure and Mechanical Property of Medium Mn Steels Tempered at Low-Temperature after Deep Cryogenic Treatment
Hao LiZeyu MinZhonghan QinZijian ChenMeilong FengBangfei ZhouWenhao Lin Tianxiang Zheng Yunbo Zhong
Author information
JOURNAL OPEN ACCESS Advance online publication

Article ID: ISIJINT-2025-038

Details
Abstract

The effects of high magnetic field (HMF) on microstructure and mechanical properties of Fe-0.3C-10Mn-3Al medium Mn steels tempered at low-temperature after deep cryogenic treatment (DCT) have been studied. The results show that the experimental steel has a high strength and a relative low elongation due to the presence of a large amount of martensite phases after the DCT. During the low temperature tempering process under the HMF, the martensite phases transform into ferrite gradually with the increase of magnetic flux density (MFD) as a result of a significant increase in elongation with a negligible decrease in tensile strength and maintaining a high work hardening capacity. With the MFD increases from 0 T to 10 T, the yield strength gradually decreases from about 1 GPa to 545 MPa with almost a constant strength more than 1.2 GPa. The uniform elongation has been improved for about 4.5 times and the product of strength and elongation has been improved for about 4 times. Besides, the volume fraction of austenite increases from 21.6% to 61.2% and the average grain size of austenite increases from 0.7 μm to 1.1 μm. This study provides new insights into the role of HMF in modulating the microstructure and mechanical properties of medium Mn steel.

Content from these authors
© 2025 The Iron and Steel Institute of Japan

This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs license
https://creativecommons.org/licenses/by-nc-nd/4.0/
Previous article Next article
feedback
Top