Fe-11Mn-4Al-0.2C中锰钢动态变形行为及其本构模型

doi:10.12068/j.issn.1005-3026.2021.09.009

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (9): 1275-1281.DOI: 10.12068/j.issn.1005-3026.2021.09.009

Fe-11Mn-4Al-0.2C中锰钢动态变形行为及其本构模型

蔡志辉^1,2,3，张德良²，文光奇²，周彦君²

(1. 太原科技大学机械工程学院，山西太原030024; 2. 东北大学材料科学与工程学院，辽宁沈阳110819; 3. 攀钢集团研究院有限公司，四川攀枝花617000)

修回日期:2021-03-14 接受日期:2021-03-14 发布日期:2021-09-16
通讯作者: 蔡志辉
作者简介:蔡志辉(1985-)，男，福建漳州人，太原科技大学教授.
基金资助:
国家自然科学基金资助项目(51974084)；太原科技大学博士科研启动基金资助项目(20202039); 中国博士后基金特别资助项目(2020T30329)；中国博士后基金面上资助项目(2020M673194).

Dynamic Deformation Behavior and Its Constitutive Model of Fe-11Mn- 4Al- 0.2C Medium-Mn Steel

CAI Zhi-hui^1,2,3， ZHANG De-liang²， WEN Guang-qi²， ZHOU Yan-jun²

1. School of Mechanical Engineering， Taiyuan University of Science and Technology， Taiyuan 030024， China; 2. School of Materials Science & Engineering， Northeastern University， Shenyang 110819， China; 3. Pangang Group Research Institute Co.， Ltd.， Panzhihua 617000， China.

Revised:2021-03-14 Accepted:2021-03-14 Published:2021-09-16
Contact: CAI Zhi-hui
About author:-
Supported by:
-

摘要/Abstract

摘要： 基于准静态和动态拉伸实验，建立Fe-11Mn-4Al-0.2C中锰钢在2×10^-3~200s^-1应变速率下变形行为的Johnson-Cook(J-C)本构模型.结果表明，应变速率对弹性变形阶段无影响.在塑性变形初期，实验钢强度随应变速率增加而增加，在塑性变形中后期，实验钢强度随应变速率增加而减少.实验钢应变速率敏感性(SRS)指数m随着应变的增加，由0.013逐渐转变为-0.018.基于实验数据建立J-C本构模型，拟合效果不佳，存在5.1%的相对误差;通过改变应变速率强化系数，提出修正J-C模型，模型具有更好的拟合效果，表现出更小的相对误差，约为1.6%.

关键词: 中锰钢;应变速率;塑性变形;应变硬化;J-C本构模型

Abstract: Based on quasi-static and dynamic tensile tests， deformation behaviors of Fe-11Mn-4Al-0.2C medium manganese steel at strain rates of 2×10^-3~200s^-1 were studied， and the corresponding Johnson-Cook(J-C)constitutive model was established. The results show that the strain rate has no effect on the stage of elastic deformation. In the early stage of plastic deformation， the strength of the tested steel increases with increase of the strain rate， while it decreases in the latter stage of plastic deformation. The strain rate sensitivity(SRS)index m of the tested steel changes from 0.013 to-0.018 with increases of the applied strain. The original J-C constitutive model did not fit well with the experimental data and was a relative error of 5.1%. After modifying the enhancement coefficient of strain rate， the revised J-C model is proposed with a better fitting and smaller relative error about 1.6%.

Key words: medium-Mn steel; strain rate; plastic deformation; strain hardening; J-C constitutive model

中图分类号:

TP20

蔡志辉，张德良，文光奇，周彦君. Fe-11Mn-4Al-0.2C中锰钢动态变形行为及其本构模型[J]. 东北大学学报（自然科学版）, 2021, 42(9): 1275-1281.

CAI Zhi-hui， ZHANG De-liang， WEN Guang-qi， ZHOU Yan-jun. Dynamic Deformation Behavior and Its Constitutive Model of Fe-11Mn- 4Al- 0.2C Medium-Mn Steel[J]. Journal of Northeastern University(Natural Science), 2021, 42(9): 1275-1281.

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Fe-11Mn-4Al-0.2C中锰钢动态变形行为及其本构模型

Dynamic Deformation Behavior and Its Constitutive Model of Fe-11Mn- 4Al- 0.2C Medium-Mn Steel

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