Fe-11Mn-2Al-2Si中锰钢的动态变形行为

doi:10.13251/j.issn.0254-6051.2025.08.006

金属热处理 ›› 2025, Vol. 50 ›› Issue (8): 30-34.DOI: 10.13251/j.issn.0254-6051.2025.08.006

Fe-11Mn-2Al-2Si中锰钢的动态变形行为

朱帅康¹, 暴嘉宁¹, 冯毅², 赵鑫³, 蔡志辉¹

1.太原科技大学机械工程学院, 山西太原 030024;
2.中国汽车工程研究院股份有限公司, 重庆 400039;
3.东北大学材料科学与工程学院, 辽宁沈阳 110819

收稿日期:2025-03-14 修回日期:2025-06-25 出版日期:2025-08-25 发布日期:2025-09-10
通讯作者: 蔡志辉,教授,博士,E-mail:tsaizhihui@163.com
作者简介:朱帅康(1997—),男,硕士,主要研究方向为高强钢的组织与性能,E-mail:zsk13994242437@163.com。
基金资助:
重庆市自然科学基金面上项目(CSTB2023NSCQ-MSX0790)

Dynamic deformation behavior of Fe-11Mn-2Al-2Si medium manganese steel

Zhu Shuaikang¹, Bao Jianing¹, Feng Yi², Zhao Xin³, Cai Zhihui¹

1. School of Mechanical Engineering, Taiyuan University of Science and Technology, Taiyuan Shanxi 030024, China;
2. China Automotive Engineering Research Institute Co., Ltd., Chongqing 400039, China;
3. School of Materials Science and Engineering, Northeastern University, Shenyang Liaoning 110819, China

Received:2025-03-14 Revised:2025-06-25 Online:2025-08-25 Published:2025-09-10

摘要/Abstract

摘要： 以Fe-11Mn-2Al-2Si中锰钢为研究对象,设计了一种外部夹具,实现不同应变量的动态中断拉伸试验,并采用扫描电镜(SEM)、X射线衍射仪(XRD)及透射电镜(TEM)对试验钢微观组织进行观察分析,探究试验钢在0.2 s^-1的应变速率下不同应变量(10%、20%、30%和全拉断)的变形机制演变规律。结果表明,在变形初期相变诱导塑性(TRIP)效应是主要变形机制,当应变量增加到30%时,TRIP效应基本不发生。随着应变量的增加,孪生诱发塑性(TWIP)效应逐渐发挥作用,TWIP效应随着应变量的增加逐渐增强,应变量为30%时,组织中已出现不同取向的形变孪晶。

关键词: 中锰钢, 微观组织, 变形机制, 动态中断拉伸试验

Abstract: Taking Fe-11Mn-2Al-2Si medium manganese steel as the research object, an external fixture was designed for limiting the deformation of the tested steel and achieving the dynamic suspended tensile tests with different strains. The microstructure, the evolution of the deformation mechanisms of the tested steel at strain rate of 0.2 s^-1with different deformations (10%, 20%, 30%, and fracture) were observed and analyzed by means of scanning electron microscope (SEM), X-ray diffractometer (XRD) and transmission electron microscope (TEM). The results indicate that in the early stage of deformation, the transformation induced plasticity (TRIP) effect is the main deformation mechanism, and when the deformation increases to 30%, the TRIP effect basically does not take place. With the increase of deformation, the twin-induced plasticity (TWIP) effect gradually comes into play. The TWIP effect is gradually enhanced with the increase of deformation. And twins with different orientations appear in the microstructure when the strain is 30%.

Key words: medium manganese steel, microstructure, deformation mechanism, dynamic suspended tensile test

中图分类号:

TG141

朱帅康, 暴嘉宁, 冯毅, 赵鑫, 蔡志辉. Fe-11Mn-2Al-2Si中锰钢的动态变形行为[J]. 金属热处理, 2025, 50(8): 30-34.

Zhu Shuaikang, Bao Jianing, Feng Yi, Zhao Xin, Cai Zhihui. Dynamic deformation behavior of Fe-11Mn-2Al-2Si medium manganese steel[J]. Heat Treatment of Metals, 2025, 50(8): 30-34.

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Fe-11Mn-2Al-2Si中锰钢的动态变形行为

Dynamic deformation behavior of Fe-11Mn-2Al-2Si medium manganese steel

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