Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (7): 7-12.doi: 10.3969/j.issn.1000-565X.2013.07.002

• Mechanical Engineering • Previous Articles     Next Articles

Morphology Observation and Analysis of Compressed Copper Bicrystals in Horizontal and Vertical Grain Boundaries

Duan Xian- yun Ruan Feng Zhang Sai- jun   

  1. School of Mechanical and Automotive Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2012-12-19 Revised:2013-03-31 Online:2013-07-25 Published:2013-06-01
  • Contact: 段先云(1977-)，男，博士生，讲师，主要从事微制造理论及微尺度材料成形、微形自动化模具的研究． E-mail:jensen_dxy@126.com
  • About author:段先云(1977-)，男，博士生，讲师，主要从事微制造理论及微尺度材料成形、微形自动化模具的研究．
  • Supported by:

    基金项目: 国家自然科学基金青年基金资助项目(50905062);广东省精密装备与制造技术重点实验室开放课题(PEMT1202)

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Abstract:

 In order to reveal the influence of grain boundary (GB) orientation on the plastic deformation of copper bicrystals (CB),first,a CB block was fabricated via the diffusion welding.Then,the equal- strain compression of CB in horizontal and vertical grain boundaries was carried out on a compressing test bed.Moreover,the microscopic morphology near the GB was observed and analyzed.The results show that different grain boundary orientations affect the slipping deformation of CB in different ways,and that,as compared with the CB in horizontal grain boundary,the vertical one is of more uneven distribution and extension of slipping line,higher stress near the GB,discontinuous and waved propagation of slipping line,more holes and cracks whose locations are much closer to or near the slipping line.

Key words: grain boundary, crystal plasticity, copper bicrystal, hole, crack