Effect of Strain Rate on Tensile Ductility and Fracture Behavior of Bulk Nanotwinned Copper

被引：10
|
作者：
You, Zesheng [1 ,2 ]
Lu, Lei [1 ]
机构：
[1] Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China
[2] Nanjing Univ Sci & Technol, Herbert Gleiter Inst Nanosci, Nanjing 210094, Jiangsu, Peoples R China
来源：
ADVANCED ENGINEERING MATERIALS | 2015年 / 17卷 / 12期
基金：
美国国家科学基金会;
关键词：
NANO-SCALE TWINS; COLUMNAR-GRAINED CU; RATE SENSITIVITY; DEFORMATION MECHANISMS; NANOSCALE TWINS; MAXIMUM STRENGTH; SIZE DEPENDENCE; METALS; BOUNDARIES; STRESS;
D O I：
10.1002/adem.201500073
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A bulk columnar-grained copper with preferentially oriented nanoscale growth twins is prepared by means of direct-current electrodeposition. Tensile tests at different strain rates reveal a significant influence of strain rate on the tensile ductility and fracture behavior. The ductility, especially the post-necking elongation, reduces dramatically at low strain rates, which is associated with evident intergranular fracture. The results suggest that the grain size as well as the grain boundary microstructural evolution exert a strong influence on the intrinsic fracture mode in the nano-twinned structure.
引用
收藏
页码：1754 / 1759
页数：6
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