...
首页> 外文期刊>ISIJ international >Effects of Strain Rate on the Deformation Mechanism of Ultra-high Strength TWIP Steel
【24h】

Effects of Strain Rate on the Deformation Mechanism of Ultra-high Strength TWIP Steel

机译:应变率对超高强度Twip钢变形机理的影响

获取原文
           

摘要

The deformation mechanism of Fe-20Mn-0.6C twinning-induced plasticity (TWIP) steel was studied with respect to different strain rates ranging from 10~(?4) to 10~(3) s~(?1). Moreover, the microstructure of the ultra-high strength TWIP steel at each strain rate was characterized by transmission electron microscopy (TEM). The TWIP steel exhibits three distinct strain hardening stages with increasing true strain. In stage II, dσ /dε shows a plateau at the strain rates of 10~(?3) to 10~(?1) s~(?1), while dσ /dε continuously decreases in the other stages with increasing strain rate. The deformation mechanism of TWIP steel under the high strain rate was a process in which the deformation twin and the dislocation slip promoted and restricted each other. When the strain rate is higher than 10~(2) s~(?1), the increase in the adiabatic heating temperature (approximately 143°C) suppresses the secondary twinning and enhances the softening effect.
机译:研究了Fe-20mN-0.6C Twinning诱导的塑性(Twip)钢的变形机制,相对于从10〜(α4)至10〜(3)S〜(α1)的不同应变率研究。此外,通过透射电子显微镜(TEM)的特征在于每种应变率下的超高强度Twip钢的微观结构。 Twip钢具有三个不同的应变硬化阶段,随着真正的应变而增加。在第II阶段,D Σ/ d ε显示在10〜(Δ3)至10〜(?1)s〜(?1)的菌株速率下的平台,而D σ/ D ε随着应变速率的增加而连续降低其他阶段。高应变率下钢的变形机制是一种过程,其中变形双胞胎和位错滑动促进和限制彼此。当应变速率高于10〜(2)S〜(α1)时,绝热加热温度的增加(约143℃)抑制二次孪生并增强软化效果。

著录项

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