• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Materials Science and Engineering >Competing deformation mechanisms in an austenite-ferrite medium-Mn steel at different strain rates
【24h】

Competing deformation mechanisms in an austenite-ferrite medium-Mn steel at different strain rates

机译：不同应变率的奥氏体 - 铁素体介质钢中竞争变形机制

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The study of strain rate is of particular significance in automotive applications. Thus, we describe here the mechanical behavior and deformation mechanisms in Fe-0.2C-11Mn-2Al medium-Mn steel in the strain rate range of 2 × 10~(-4)-200s~(-1). The ultimate tensile strength decreased from 1456 MPa to 1086 MPa with increase in strain rate, the strain rate sensitivity index m of flow stress decreased generally from -0.00154 to -0.0146 with the increase of strain, and the uniform elongation decreased from 39.4% to 33.0% with the increase of strain rate (2 × 10~(-4)-2s~(-1)). However, the elongation increased to 37.5% when the strain rate is further increased to 200s~(-1). Transformation-induced plasticity (TRIP) effect and PLC effect was dominant at low strain rates (2 × 10~(4)-2× 10~(-3)s~(-1)), but at medium strain rates (2 × 10~(-2)-2s~(-1)), TRIP effect was significantly suppressed, twining-induced plasticity (TWIP) effect and softening effect increased gradually with strain rate, which compensated for the loss of TRIP effect. At high strain rates (20-200s~(-1)), TRIP effect, TWIP effect and softening effect enhanced simultaneously, but PLC effect was suppressed with increase in strain rate, contributing to increase in ductility with increasing strain rate. According to the fracture microstructure, it was indicated that normal stress was dominant at low strain rates, while shear stress played an increasingly prominent role at medium and especially high strain rates.
机译：在汽车应用中的应变速率研究特别重要。因此，我们在这里描述了2×10〜（-4）-200s〜（-1）的应变速率范围内的Fe-0.2C-11Mn-2型培养基-MN钢中的机械特性和变形机制。从1456MPa到1086MPa降低的极限拉伸强度随着应变率的增加而降低，流量应力的应变率敏感性指数M通常随着菌株的增加而降低至-0.0.0.0146，并且均匀伸长率从39.4％降低至33.0随着应变率的增加（2×10〜（-4）-2s〜（-1））的增加。然而，当应变速率进一步增加至200s〜（-1）时，伸长率增加到37.5％。转化诱导的可塑性（思维）效应和PLC效应在低应变率（2×10〜（4）-2×10〜（-3）S〜（-1）），但在中等应变率（2× 10〜（ - 2）-2s〜（-1）），跳闸效果显着抑制，缠绕诱导的可塑性（TWIP）效应和软化效果逐渐增加了应变率，这补偿了跳闸效果的丧失。在高应变率（20-200s〜（-1）），跳闸效果，同时增强了Twip效应和软化效果，但随着应变率的增加，PLC效应抑制了延展性的增加，随着应变率的增加。根据骨折微观结构，表明正常应力以低应变速率优势，而剪切应力在培养基中具有越来越突出的作用。

著录项

  • 来源
    《Materials Science and Engineering》 |2021年第22期|141357.1-141357.11|共11页
  • 作者

    Z.H. Cai; D.L. Zhang; L.F. Ma; H. Ding; Y. Feng; J. Hu; R.D.K. Misra;

  • 作者单位

    School of Mechanical Engineering Taiyuan University of Science and Technology Taiyuan 030024 China School of Materials Science and Engineering Northeastern University Shenyang 110819 China;

    School of Materials Science and Engineering Northeastern University Shenyang 110819 China;

    School of Mechanical Engineering Taiyuan University of Science and Technology Taiyuan 030024 China;

    School of Materials Science and Engineering Northeastern University Shenyang 110819 China;

    China Automotive Engineering Research Institute Co. Ltd Chongqing 401122 China;

    The State Key Laboratory of Rolling and Automation Northeastern University Shenyang 110819 China;

    Laboratory for Excellence in Advanced Steel Research Department of Metallurgical Materials and Biomedical Engineering University of Texas at El Paso El Paso TX 79968 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Medium Mn steel; Strain rate; TRIP effect; TWIP effect; Mechanical properties;

    机译：中锰钢;应变率;跳闸效果;Tewip效果;机械性能;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号