On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel

Pan，Shuai; He，Binbin

2020-07-30

10.3389/fmats.2020.00256

Frontiers in Materials   影响因子和分区

2296-8016

2296-8016

In this contribution, we investigate the influence of three heat treatments, including intercritical annealing (IA), quenching and partitioning (Q&P), and combination of IA and Q&P (IA-Q&P), on microstructure and mechanical properties of the medium Mn steel. The steel treated by the IA process has the largest volume fraction of austenite, which is responsible for the longest elongation and largest energy absorption with the operation of both transformation-induced plasticity (TRIP) effect and twinning-induced plasticity (TWIP) effects. The medium Mn steel produced by IA-Q&P treatment has a mixture microstructure with retained austenite, ferrite, and lath martensite. The existence of martensite in the IA-Q&P steel makes the higher yield strength than that of the IA steel. The better uniform elongation of the IA-Q&P steel than that of the Q&P steel is ascribed to the larger volume fraction of retained austenite and higher mechanical stability of austenite. The Q&P steel has the highest yield stress due to its martensite matrix. It is expected that the tensile properties of medium Mn steel can be tuned by different thermal processes (IA, Q&P, and IA-Q&P) to facilitate its broad automotive applications.

advanced high strength steels deformation twins intercritical annealing martensitic transformation medium Mn steel quenching and partitioning

SCI ; EI

英语

第一 ; 通讯

Southern University of Science and Technology[33/Y01336122]

Materials Science

Materials Science, Multidisciplinary

WOS:000561529900001

FRONTIERS MEDIA SA

20210809940283

Austenite ; Heat treatment ; Martensite ; Mechanical stability ; Microstructure ; Plasticity ; Transformation Induced Plasticity steel ; Volume fraction ; Yield stress

Metallography:531.2 ; Heat Treatment Processes:537.1 ; Thermodynamics:641.1 ; Materials Science:951

2-s2.0-85089431785

Scopus

Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen,China

Pan，Shuai,He，Binbin. On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel[J]. Frontiers in Materials,2020,7.

Pan，Shuai,&He，Binbin.(2020).On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel.Frontiers in Materials,7.

Pan，Shuai,et al."On the Variants of Thermal Process in Developing Strong and Ductile Medium Mn Steel".Frontiers in Materials 7(2020).