期刊文献+

Detwinning-induced reduction in ductility of twinned copper nanowires 被引量:2

Detwinning-induced reduction in ductility of twinned copper nanowires
原文传递
导出
摘要 Detwinning is a unique deformation mechanism of nanotwinned metals with twin lamellae thickness down to a few nanometers.In this work we investigate the impact of detwinning mechanism on the tensile ductility of twinned Cu nanowires containing high density of parallel twin boundaries by means of molecular dynamics simulations.Simulation results show that the fracture strain of twinned Cu nanowires has a strong dependence on twin boundary spacing,resulting from the competition between individual deformation modes.Particularly for the twinned Cu nanowires containing the thinnest twin lamellaes,the dominant detwinning mechanism leads to a significant reduction in the tensile ductility.It is found that detwinning originates from twin boundary migration,which is a result of the glide of lattice partial dislocations on the twin planes.This work advances our fundamental understanding of the twin boundary-related mechanical properties of twinned metallic nanowires. Detwinning is a unique deformation mechanism of nanotwinned metals with twin lamellae thickness down to a few nanometers. In this work we investigate the impact of detwinning mechanism on the tensile ductility of twinned Cu nanowires containing high density of parallel twin boundaries by means of molecular dynamics simulations. Simulation results show that the fracture strain of twinned Cu nanowires has a strong dependence on twin boundary spacing, resulting from the competition between individual deformation modes. Particularly for the twinned Cu nanowires containing the thinnest twin lamellaes, the dominant detwinning mechanism leads to a significant reduction in the tensile ductility. It is found that detwinning originates from twin boundary mi- gration, which is a result of the glide of lattice partial dislocations on the twin planes. This work advances our fundamental under- standing of the twin boundary-related mechanical properties of twinned metallic nanowires.
出处 《Chinese Science Bulletin》 SCIE EI CAS 2013年第6期684-688,共5页
基金 supported by China Postdoctoral Science Foundation(2012M511463) Heilongjiang Postdoctoral Foundation of China (LBH-Z11143) the ICAMS,Ruhr-University Bochum,Germany
关键词 金属纳米线 孪晶界 延展性 分子动力学模拟 诱导 变形机制 片层厚度 Cu nanowires, twin boundary, uniaxial tension, detwinning, molecular dynamics
  • 相关文献

同被引文献23

引证文献2

二级引证文献12

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部