期刊
MATERIALS CHARACTERIZATION
卷 94, 期 -, 页码 80-85出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.matchar.2014.05.012
关键词
Aluminum alloy; Nano-TiC particle; Composite; Tensile properties; Microstructure; theta ' precipitate
类别
资金
- National Natural Science Foundation of China [51171071]
- National Basic Research Program of China (973 Program) [2012CB619600]
- NNSFC [50971065, 50531030]
- Research Fund for the Doctoral Program of High Education of China [20130061110037]
- Project 985-High Performance Materials of Jilin University
Many experimental and theoretical studies indicated that the decrease of the size of the reinforcing particles can lead to substantial improvements in the mechanical performance of the composites. However, the investigations on the addition of the nano particles into conventional metal materials are still rare, especially the nano-TiCp into the Al-Cu alloys. In this study, the Ni coated nano-TiCp reinforced Al-Cu matrix composites were successfully fabricated by a casting route. It was found that the nano-TiCp was in the alpha-Al grains. The alpha-Al dendrites became finer and more developed. Moreover, the theta' precipitates in the Al-Cu matrix were finer and uniformly distributed. The tensile strength and elongation of the composites increased simultaneously. After T6 heat treatment, compared with the unreinforced Al-Cu alloy, the tensile strength and elongation of the 0.8 wt.% nano-sized,TiCp/Al-Cu composite increased from 485 MPa and 6.6% to 573 MPa and 12.4%, respectively. (C) 2014 Elsevier Inc. All rights reserved.
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