中国物理B ›› 2012, Vol. 21 ›› Issue (8): 83101-083101.doi: 10.1088/1674-1056/21/8/083101

• ATOMIC AND MOLECULAR PHYSICS • 上一篇    下一篇

Investigation of activities of grain boundaries in nanocrystalline Al under an indenter by a multiscale method

邵宇飞a, 杨鑫a, 赵星b, 王绍青c   

  1. a Institute of Applied Physics and Technology, Department of General Studies, Liaoning Technical University, Huludao 125105, China;
    b Department of Mathematics and Physics, Liaoning University of Technology, Jinzhou 121001, China;
    c Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • 收稿日期:2011-12-26 修回日期:2012-03-12 出版日期:2012-07-01 发布日期:2012-07-01
  • 基金资助:
    Project supported by the State Key Development Program for Basic Research of China (Grant No. 2011CB606403).

Investigation of activities of grain boundaries in nanocrystalline Al under an indenter by a multiscale method

Shao Yu-Fei (邵宇飞)a, Yang Xin (杨鑫)a, Zhao Xing (赵星)b, Wang Shao-Qing (王绍青 )c   

  1. a Institute of Applied Physics and Technology, Department of General Studies, Liaoning Technical University, Huludao 125105, China;
    b Department of Mathematics and Physics, Liaoning University of Technology, Jinzhou 121001, China;
    c Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China
  • Received:2011-12-26 Revised:2012-03-12 Online:2012-07-01 Published:2012-07-01
  • Contact: Shao Yu-Fei, Zhao Xing E-mail:yfshao@alum.imr.ac.cn; zhao-heng-xing@126.com
  • Supported by:
    Project supported by the State Key Development Program for Basic Research of China (Grant No. 2011CB606403).

摘要: Activities of grain boundaries in nanocrystalline Al under an indenter are studied by a multiscale method. It is found that grain boundaries and twin boundaries can be transformed into each other by emitting and absorbing dislocations. The transition processes might result in grain coarsening and refinement events. Dislocation reflection generated by a piece of stable grain boundary is also observed, because of the complex local atomic structure within the nanocrystalline Al. This implies that nanocrystalline metals might improve their internal structural stability with the help of some special local grain boundaries.

关键词: multiscale simulation, nanocrystalline materials, grain boundaries, dislocations

Abstract: Activities of grain boundaries in nanocrystalline Al under an indenter are studied by a multiscale method. It is found that grain boundaries and twin boundaries can be transformed into each other by emitting and absorbing dislocations. The transition processes might result in grain coarsening and refinement events. Dislocation reflection generated by a piece of stable grain boundary is also observed, because of the complex local atomic structure within the nanocrystalline Al. This implies that nanocrystalline metals might improve their internal structural stability with the help of some special local grain boundaries.

Key words: multiscale simulation, nanocrystalline materials, grain boundaries, dislocations

中图分类号:  (Molecular dynamics and other numerical methods)

  • 31.15.xv
61.72.Mm (Grain and twin boundaries) 61.82.Rx (Nanocrystalline materials) 61.72.Lk (Linear defects: dislocations, disclinations)