Thermomechanical Treatment Performance and Flow Stress Model of a Fe-Mn-Al-C Low-Density Steel

被引：4
作者：
Wang, Weijun [1 ]
Zhang, Bendao [1 ]
Cen, Qiongying [1 ]
Zhang, Mei [1 ]
Man, Tinghui [1 ]
Dong, Han [1 ]
机构：
[1] Shanghai Univ, Sch Mat & Sci Engn, Shanghai 200444, Peoples R China
来源：
STEEL RESEARCH INTERNATIONAL | 2023年 / 94卷 / 03期
基金：
中国国家自然科学基金; 国家重点研发计划;
关键词：
Fe-Mn-Al-C low-density steel; flow stress model; hot-processing map; thermomechanical treatment; HOT DEFORMATION-BEHAVIOR; DYNAMIC RECRYSTALLIZATION; CONSTITUTIVE ANALYSIS; TENSILE PROPERTIES; STAINLESS-STEEL; PROCESSING MAP; TWIP STEELS; MICROSTRUCTURE; COMPRESSION; WORKABILITY;
D O I：
10.1002/srin.202200544
中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The flow stress curves of Fe-31.7Mn-11.5Al-0.9C low-density steel are obtained by a hot-compression test with a Gleeble-3500 thermomechanical simulator. It is shown in the results that the dynamic recovery and dynamic recrystallization (DRX) of delta-ferrite occur preferentially under the same deformation condition, inducing a "yield point-like" phenomenon in the true stress-strain curves. The Zener-Hollomon parameter is introduced to fit the characteristic parameters used to establish the flow stress model according to Arrhenius hyperbolic sine relationship and Avrami equation, and the DRX activation energy of austenite is 414.12 KJ mol(-1). The hot-processing maps at different true strains are simulated based on the dynamic material model to determine the suitable hot-rolling process and the optimal hot-working process selection of high strain rate and high deformation temperature combination, 1100-950 degrees C/1-0.2 s(-1), is recommended.
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页数：11
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