Dislocation characterization in fatigued Cu with nanoscale twins

被引：7
作者：
Pan, Qingsong [1 ]
Lu, Lei [1 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
来源：
SCIENCE CHINA-MATERIALS | 2015年 / 58卷 / 12期
关键词：
COLUMNAR-GRAINED CU; COPPER; DEFORMATION; POLYCRYSTALS; STABILITY; BEHAVIOR; SAMPLES; DAMAGE;
D O I：
10.1007/s40843-015-0104-8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Previous studies have shown that strain-controlled cyclic stability was maintained in bulk Cu samples with highly oriented nanoscale twins. In order to explore the underlying fatigue mechanism, transmission electron microscopy observations under two-beam diffraction condition were utilized to characterize the dislocation configurations in the twin/matrix layers of as-fatigued nanotwinned Cu. It was clarified that the threading dislocations with Burgers vector parallel to twin boundaries are mainly active during fatigue. A three-dimensional stereo projection was re-configured for demonstrating the special structure of dislocations in nanoscale twins.
引用
收藏
页码：915 / 920
页数：6
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