Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
9795770 | Materials Science and Engineering: A | 2005 | 6 Pages |
Abstract
A new superhigh strength Al-Zn-Mg-Cu alloy was made by low frequency electromagnetic casting (LFEC) and conventional direct chill (DC) casting, respectively. The effects of low frequency electromagnetic field on the as-cast microstructures and mechanical properties were investigated. The results show that under the low frequency electromagnetic field (25Â Hz, 32Â mT), the microstructures of LFEC ingot from the border to the center on the cross section are all fine equiaxed or nearly equiaxed grains. The grains are much finer and more uniform than that of DC ingot. It was found that magnetic flux density plays an important role on the microstructure formation of LFEC ingots. With increasing the magnetic flux density, grains become finer and more uniform. In the range of experimental parameters, the optimum magnetic flux density for LFEC process is found to be 32Â mT. The mechanical tests show that for this new superhigh strength Al-Zn-Mg-Cu alloy, the as-cast mechanical properties of LFEC ingot are much higher than that of DC ingot.
Keywords
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Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Yubo Zuo, Jianzhong Cui, Jie Dong, Fuxiao Yu,