Austenite stability and deformation-induced transformation mechanism in cold-rolled medium-Mn steel

被引：35
|
作者：
Zhou, T. P. [1 ,2 ]
Wang, C. Y. [2 ]
Wang, C. [2 ]
Cao, W. Q. [2 ]
Chen, Z. J. [1 ]
机构：
[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China
[2] Cent Iron & Steel Res Inst, Beijing 100081, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2020年 / 798卷
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Medium Mn steel; Intercritical annealing; Austenite; Mechanical stability; Thermal stability; Stress- and strain-induced transformation; INDUCED-PLASTICITY STEEL; RETAINED AUSTENITE; TENSILE PROPERTIES; GRAIN-SIZE; BEHAVIOR; MARTENSITE; TEMPERATURE; STRENGTH; MICROSTRUCTURE; DEPENDENCE;
D O I：
10.1016/j.msea.2020.140147
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The austenite stability and tensile properties of intercritically annealed samples of cold-rolled medium-Mn steel (0.15C-5Mn-1.1Al) were investigated. The influence of austenite grain size and element concentration on the mechanical stability of austenite was studied, which demonstrated that the C content in austenite was a critical factor governing the mechanical stability of austenite. The thermal stability of austenite in cold-rolled medium-Mn steel samples annealed for different durations at different temperatures was quantitatively analyzed. The results showed that the effect of annealing temperature on the thermal stability of austenite was stronger than that of annealing time. In addition, the samples subjected to heat treatment under different conditions resulted in different work hardening (WH) behavior and mechanical properties due to variations in the mechanical stability of the retained austenite. It was concluded that these differences were related to the changes in stressand strain induced transformation modes of the retained austenite.
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页数：9
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