Effect of Ca Addition and Heat Treatment on the A390(S)/AM60(L) Interface Microstructure
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2016年第5期
论文作者：马立坤 陈翌庆 LIU Lihua SU Yong XU Guangchen FANG Hongjiao
文章页码：1117 - 1122
摘 要：Overcasting is a new kind of dissimilar joining technique used to produce the aluminum（solid）/magnesium（liquid） bonding bi-metallic material in this study. For the Al/Mg（A390/AM60） bi-metallic samples, the interface microstructures are the research points, which directly influence the mechanical properties. It is, therefore, of vital importance to find a method to improve the interface microstructures. This research focused on the effect of the calcium（Ca） addition in the liquid Mg alloys and the heat treatment on the A390/AM60 interface microstructures of the bi-metallic samples. The testing results showed that, with Ca addition in AM60, owing to two possible reasons, the interface microstructure and the shear strength of the A390/AM60 bi-metallic samples could be improved. The heat treatment could further improve the interface microstructure and the mechanical properties by dissolving β-Mg17Al12 into α-Mg and destroying the Mg2Si layer structure.
马立坤，陈翌庆，LIU Lihua，SU Yong，XU Guangchen，FANG Hongjiao
School of Materials Science and Engineering, Hefei University of Technology
摘 要：Overcasting is a new kind of dissimilar joining technique used to produce the aluminum（solid）/magnesium（liquid） bonding bi-metallic material in this study. For the Al/Mg（A390/AM60） bi-metallic samples, the interface microstructures are the research points, which directly influence the mechanical properties. It is, therefore, of vital importance to find a method to improve the interface microstructures. This research focused on the effect of the calcium（Ca） addition in the liquid Mg alloys and the heat treatment on the A390/AM60 interface microstructures of the bi-metallic samples. The testing results showed that, with Ca addition in AM60, owing to two possible reasons, the interface microstructure and the shear strength of the A390/AM60 bi-metallic samples could be improved. The heat treatment could further improve the interface microstructure and the mechanical properties by dissolving β-Mg17Al12 into α-Mg and destroying the Mg2Si layer structure.
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