中国物理B ›› 2015, Vol. 24 ›› Issue (9): 96202-096202.doi: 10.1088/1674-1056/24/9/096202

• CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES • 上一篇    下一篇

Effects of tilt interface boundary on mechanical properties of Cu/Ni nanoscale metallic multilayer composites

杨萌a, 徐建刚a, 宋海洋b, 张云光a   

  1. a School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, China;
    b College of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China
  • 收稿日期:2014-10-07 修回日期:2015-04-06 出版日期:2015-09-05 发布日期:2015-09-05
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10902083), the Program for New Century Excellent Talent in University of Ministry of Education of China (Grant No. NCET-12-1046), the Program for New Scientific and Technological Star of Shaanxi Province, China (Grant No. 2012KJXX-39), and the Natural Science Basic Research Plan in Shaanxi Province, China (Grant No. 2014JQ1036).

Effects of tilt interface boundary on mechanical properties of Cu/Ni nanoscale metallic multilayer composites

Yang Meng (杨萌)a, Xu Jian-Gang (徐建刚)a, Song Hai-Yang (宋海洋)b, Zhang Yun-Guang (张云光)a   

  1. a School of Science, Xi'an University of Posts and Telecommunications, Xi'an 710121, China;
    b College of Materials Science and Engineering, Xi'an Shiyou University, Xi'an 710065, China
  • Received:2014-10-07 Revised:2015-04-06 Online:2015-09-05 Published:2015-09-05
  • Contact: Yang Meng, Song Hai-Yang E-mail:ymphysics@163.com;gsfshy@sohu.com
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10902083), the Program for New Century Excellent Talent in University of Ministry of Education of China (Grant No. NCET-12-1046), the Program for New Scientific and Technological Star of Shaanxi Province, China (Grant No. 2012KJXX-39), and the Natural Science Basic Research Plan in Shaanxi Province, China (Grant No. 2014JQ1036).

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摘要： The effect of tilt interfaces and layer thickness of Cu/Ni multilayer nanowires on the deformation mechanism are investigated by molecular dynamics simulations. The results indicate that the plasticity of the sample with a 45° tilt angle is much better than the others. The yield stress is found to decrease with increasing the tilt angle and it reaches its lowest value at 33°. Then as the tilt angle continues to increase, the yield strength increases. Furthermore, the studies show that with the decrease of layer thickness, the yield strength gradually decreases. The study also reveals that these different deformation behaviors are associated with the glide of dislocation.

关键词: multilayer composite, molecular dynamics simulation, mechanical property

Abstract: The effect of tilt interfaces and layer thickness of Cu/Ni multilayer nanowires on the deformation mechanism are investigated by molecular dynamics simulations. The results indicate that the plasticity of the sample with a 45° tilt angle is much better than the others. The yield stress is found to decrease with increasing the tilt angle and it reaches its lowest value at 33°. Then as the tilt angle continues to increase, the yield strength increases. Furthermore, the studies show that with the decrease of layer thickness, the yield strength gradually decreases. The study also reveals that these different deformation behaviors are associated with the glide of dislocation.

Key words: multilayer composite, molecular dynamics simulation, mechanical property

中图分类号:  (Mechanical properties of nanoscale systems)

  • 62.25.-g
61.46.-w (Structure of nanoscale materials) 64.70.Nd (Structural transitions in nanoscale materials)