Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 589, Issue -, Pages 19-24Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.11.187
Keywords
Al-Ti-C master alloy; Al-Cu alloy; Microstructure; Grain refinement; Mechanical properties
Categories
Funding
- National Natural Science Foundation of China [51071097]
- National Basic Research Program of China (973 Program) [2012CB825702]
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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 alpha-Al is reduced from about 1000 mu m to 50 mu 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 theta' 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 theta' precipitates. (C) 2013 Elsevier B. V. All rights reserved.
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