Enhanced strength-ductility of medium Mn steel by quenching, partitioning and tempering

被引：15
作者：
Cai, Minghui [1 ,2 ]
Huang, Hongshou [1 ,2 ]
Zuo, Xiurong [3 ]
Ding, Hua [1 ,2 ]
Stanford, Nicole [4 ]
机构：
[1] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China
[2] Northeastern Univ, Key Lab Lightweight Struct Mat, Shenyang 110819, Peoples R China
[3] Zhengzhou Univ, Sch Phys & Engn, Minist Educ, Key Lab Mat Phys, Zhengzhou, Peoples R China
[4] Univ South Australia, Future Ind Inst, Adelaide, SA 5095, Australia
来源：
MATERIALS SCIENCE AND TECHNOLOGY | 2020年 / 36卷 / 05期
基金：
中国国家自然科学基金;
关键词：
Medium Mn steel; microstructures; mechanical properties; TRIP effect; quenching-partitioning-tempering; X-RAY-DIFFRACTION; WORK-HARDENING BEHAVIOR; RETAINED AUSTENITE; MECHANICAL-PROPERTIES; THERMAL-STABILITY; DISLOCATION DENSITY; TENSILE PROPERTIES; RECENT PROGRESS; GRAIN-SIZE; MICROSTRUCTURE;
D O I：
10.1080/02670836.2020.1719305
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A quench and partition (Q&P) process was combined with tempering in a medium Mn steel. The partitioning treatment enriched the austenite in carbon, and stabilised the austenite against transformation during cooling. The ductility of Q&P steel is significantly improved by tempering, with negligible loss in strength. The ductility was found to be determined by the martensite in the structure, rather than the austenite in the present case. The reason for the significant improvement in the ductility with tempering was suggested to be the reduction in the dislocation density after extended tempering treatment. The energy absorption of this alloy was increased to 28.5 GPa center dot% together with an ultrahigh tensile strength similar to 1400 MPa, which is one of the largest observations in this system.
引用
收藏
页码：584 / 597
页数：14
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