...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Philosophical Magazine Letters >Explanation of the discrepancy between the measured and atomistically calculated yield stresses in body-centred cubic metals
【24h】

Explanation of the discrepancy between the measured and atomistically calculated yield stresses in body-centred cubic metals

机译：以体为中心的立方金属中的实测屈服应力与原子计算得出的屈服应力之间的差异的解释

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

We propose a mesoscopic model that explains the discrepancy ( at a factor of 2 - 3) between experimentally measured yield stresses of bcc metals at low temperatures and typical Peierls stresses determined by atomistic simulations of isolated screw dislocations. The model involves a Frank-Read-type source emitting dislocations that become pure screws at a certain distance from the source and, owing to their high Peierls stress, control its operation. However, due to the mutual interaction between emitted dislocations, the group consisting of both non-screw and screw dislocations can move at an applied stress that is a factor of 2 - 3 lower than the stress needed for the glide of individual screw dislocations.
机译：我们提出了一种介观模型，该模型解释了低温下通过实验测量的密晶金属的屈服应力与通过孤立的螺旋位错的原子模拟确定的典型的Peierls应力之间的差异（约为2-3）。该模型涉及一个Frank-Read型源发射的位错，该位错在距源一定距离处变成纯螺钉，并由于其较高的Peierls应力而控制其操作。但是，由于发射的位错之间的相互影响，由非螺钉位错和螺钉位错组成的组可以在施加的应力下运动，该应力比单个螺钉位错滑行所需的应力低2-3倍。

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