期刊
SCRIPTA MATERIALIA
卷 124, 期 -, 页码 103-107出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2016.07.003
关键词
Strength; Ductility; Copper; Surface mechanical attrition treatment (SMAT); Planar heterogeneous structure
类别
资金
- National Key Basic Research Program [2012CB932203]
- Innovation and Technology Commission via Hong Kong Branch of National Precious Metals Material Engineering Research Center
- National Natural Science Foundation of China (NSFC) [51301147]
- City University of Hong Kong [9610288, 9680108]
- National Natural Science Foundation of China [11472243]
- Doctoral Fund of Ministry of Education of China [20130101120175]
By using topologically controlled surface mechanical attrition treatment (SMAT), we processed annealed copper (Cu) and obtained an improved strength without sacrifice of ductility. The partially SMAT process demonstrated its ability to introduce a planar heterogeneous structure in the Cu, while the hardness measurements and microstructure characterization showed that the hard phase SMATed areas were embedded in the soft matrix of coarse grained Cu, forming a unique bimodal structure combined with both coarse grains and nano-twinning grains, contributing to the overall strengthening. Finite element simulation and theoretical modeling were performed to explain the underlying mechanism for the material property enhancement. (C) 2016 Elsevier Ltd. All rights reserved.
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