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《Special Casting & Nonferrous Alloys》 2003-01
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Effects of Micro-Alloying Elements on the Quasi-solid Mechanical Properties of Al-4.5Cu Alloy

Dong Shengquan Zhou Jing'en (Xi'an Jiaotong University, Xi'an, China) Yan Wen Liang Yanfeng Li Jianping Yang Tong (Xi'an Institute of Technology, Xi'an, China)  
The effects of Micro-alloying elements, in cluding Si, Ce, La, Ti, Zr, Ni,Mn on the quasi-solid mechanical properties of Al-4.5Cu alloy were investigated through examining contracted strain and hot crack resistance as well as quasi-solid mechanical behavior. The results showed that addition of Si, Ce, La, Ti, Zr can reduce the hot crack tendency of the alloy. Adding 2% Si into the base alloy, recalescence phenomenon of the alloy is so severe that the alloy has no longer higher strength resulting in rapid! fracture. Compared to other AlCu4.5Si alloy, AlCu4.5Si3 alloy exhibited very strong feeding ability and highest fracture stress value. Addition of La can reduce secondary dendrite arm spacing and improve significandy hot crack resistance of the alloy.
【Fund】: 国家自然科学基金项目 (40 4 0 1 0 50 1 0 2 )
【CateGory Index】: TG146.2
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