Age-hardening medium Mn steel with high strength and large ductility

被引：24
|
作者：
Zhang, Bao-Guang [1 ]
Zhang, Xiao-Ming [1 ]
Wang, Guo-Dong [1 ]
Liu, Hai-Tao [1 ]
机构：
[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Liaoning, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2019年 / 756卷
基金：
中国博士后科学基金; 中国国家自然科学基金;
关键词：
Medium-Mn steel; Intermetallic compounds; Aging; Retained austenite; Transformation-induced plasticity; TRANSFORMATION-INDUCED PLASTICITY; MECHANICAL-PROPERTIES; AUSTENITE STABILITY; ULTRAHIGH STRENGTH; MICROSTRUCTURE; DEFORMATION; COMBINATION; TOUGHNESS; PROPERTY;
D O I：
10.1016/j.msea.2019.04.019
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
An age-hardening cold-rolled ultrahigh-strength Fe-0.2C-7Mn-3Al-3Ni (wt.%) steel with large ductility was developed via intercritical annealing and followed by aging. It was observed that aging treatment not only resulted in high density nanosized NiAl intermetallic precipitate but it also strongly affected ferrite-austenite duplex microstructure especially the content and stability of austenite due to the partition of elements. Besides, it was found that aging treatment led to a simultaneous increase in both strength and total elongation, which was attributed to high-density NiAl nanoprecipitate, strong dislocation hardening, much stronger transformation-induced plasticity (TRIP) effect and the involvement of twinning-induced plasticity (TWIP) effect.
引用
收藏
页码：35 / 40
页数：6
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