期刊
PHYSICA E-LOW-DIMENSIONAL SYSTEMS & NANOSTRUCTURES
卷 83, 期 -, 页码 329-332出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physe.2016.04.027
关键词
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资金
- National Natural Science Foundation of China [11204252, 51271156]
- Natural Science Foundation of Fujian Province of China [2013J06002]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20130121110012]
- Fundamental Research Funds for the Central Universities of China [20720150023]
In this article, molecular simulations were adopted to explore the cold welding processes of copper nanowires with both single-crystalline and fivefold twinned structures. It was verified that the twinned nanowires exhibited enhanced strength but lowered elastic limit and ductility. Both nanowires could be successfully welded through rather small loadings, although their stress-strain responses toward compression were different. Meanwhile, more stress was accumulated in the twinned nanowire due to repulsive force of the twin boundaries against the nucleation and motions of dislocations. Moreover, by characterizing the structure evolutions in the welding process, it can be ascertained that perfect atomic order was finally built at the weld region in both nanowires. This comparison study will be of great importance to future mechanical processing of metallic nanowires. (C) 2016 Elsevier B.V. All rights reserved.
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