Effect of Ca addition and heat treatment on the A390(S)/AM60(L) interface microstructure

Effect of Ca addition and heat treatment on the A390(S)/AM60(L) interface microstructure
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Ca添加及热处理对A390(S)/AM60(L)界面显微组织的影响

DOI:
10.1007/s11595-016-1499-0
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发表时间:
2016-10
期刊:
Journal Wuhan University of Technology, Materials Science Edition
影响因子:
--
通讯作者:
Fang Hongjiao
Fang Hongjiao
中科院分区:
其他
文献类型:
--
作者:
Ma Likun;Chen Yiqing;Liu Lihua;Su Yong;Xu Guangchen;Fang Hongjiao

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覆盖铸造是一种新型的异种连接技术,用于制备铝(固)/镁(液)结合双金属材料。对于Al/Mg(A390/AM60)双金属材料,界面组织是研究的重点,直接影响材料的力学性能。因此,寻找一种改善界面微结构的方法是至关重要的。研究了在液态镁合金中添加钙(Ca)和热处理对双金属样品A390/AM60界面组织的影响。试验结果表明,由于两种可能的原因,在AM60中添加钙可以改善A390/AM60双金属试件的界面组织和剪切强度。热处理可使β-α_(17)Al_(12)固溶于镁合金中,破坏镁硅层结构,从而进一步改善界面组织和力学性能。
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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