Influence of a new kind of Al-Ti-C master alloy on the microstructure and mechanical properties of Al-5Cu alloy
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- 作者：Tao Wang ; Tong Gao ; Ping Zhang ; Jinfeng Nie ; Xiangfa Liu
- 关键词：Al&ndash ; Ti&ndash ; C master alloy ; Al&ndash ; Cu alloy ; Microstructure ; Grain refinement ; Mechanical properties
- 刊名：Journal of Alloys and Compounds
- 出版年：15 March, 2014
- 年：2014
- 卷：589
- 期：Complete
- 页码：19-24
- 全文大小：2858 K
文摘
The microstructure and mechanical properties of Al-5Cu alloy refined by a new kind of Al-5Ti-0.75C master alloy were investigated. The results show that the master alloy has an excellent grain refining performance on Al-5Cu alloy, and the average grain size of 伪-Al is reduced from about 1000 渭m to 50 渭m when 0.2 wt.% of the master alloy was added. It also indicates that the addition of Al-5Ti-0.75C considerably increases the quantity of 胃鈥?precipitates and decreases their sizes during heat treatment process. In addition, the tensile property, hardness and wear resistance of the Al-5Cu alloy are improved markedly after grain refinement. The improved mechanical properties are attributed to a fine equiaxed grain structure of the alloy, a dispersed distribution of second phases and a large number of fine 胃鈥?precipitates.