纳米孪晶金属塑性变形机制*
卢 磊, 女, 1970年生, 研究员, 博士
收稿日期: 2013-11-05
修回日期: 2013-11-05
网络出版日期: 2014-02-20
基金资助
* 国家重点基础研究发展计划项目2012CB932202以及国家自然科学基金项目51071153和51371171资助
PLASTIC DEFORMATION MECHANISMS IN NANOTWINNED METALS
Received date: 2013-11-05
Revised date: 2013-11-05
Online published: 2014-02-20
Supported by
Supported by National Basic Research Program of China (No.2012CB932202) and National Natural Science Foundation of China (Nos.51071153 and 51371171)
卢磊 , 尤泽升 . 纳米孪晶金属塑性变形机制*[J]. 金属学报, 2014 , 50(2) : 129 -136 . DOI: 10.3724/SP.J.1037.2013.00697
A brief overview is provided about the plastic deformation mechanisms in nanotwinned metals. The unique two-dementional nanoscale twin lamellae lead to different dislocation slip systems activated during plastic deformation. It has been revealed that there are three distinctly different dislocation-mediated deformation mechanisms in nanotwinned metals, namely dislocation pile-up against and slip transfer across twin boundaries, Shockley partials gliding on twin boundaries leading to twin boundary migration, and threading dislocations slip confined by neighboring twin boundaries. It is further demonstrated that these three dislocation-mediated mechanisms are switchable upon changing in the loading direction with respect to twin boundaries.
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