Effect of Al2Ca intermetallic compound addition on grain refinement of AZ31 magnesium alloy

The Al2Ca intermetallic compound was prepared by melting process in a vacuum induction furnace. And the Al2Ca compound was added in as-cast AZ31 alloys for grain refinement. The effect of its additional levels on grain refinement of as-cast AZ31 alloy was investigated and the mechanism of the grain...

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Bibliographic Details
Published in:Transactions of Nonferrous Metals Society of China 2016-05, Vol.26 (5), p.1284-1293
Main Authors: JIANG, Zhong-tao, JIANG, Bin, ZHANG, Jian-yue, DAI, Jia-hong, YANG, Qing-shan, YANG, Qin, PAN, Fu-sheng
Format: Article
Language:English
Subjects:
Al2Ca
AZ31 magnesium alloy
grain refinement
mechanism
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Summary:The Al2Ca intermetallic compound was prepared by melting process in a vacuum induction furnace. And the Al2Ca compound was added in as-cast AZ31 alloys for grain refinement. The effect of its additional levels on grain refinement of as-cast AZ31 alloy was investigated and the mechanism of the grain refinement was discussed. The results reveal that the addition of 1.1% Al2Ca (mass fraction) decreases the average grain size of as-cast AZ31 alloy from 354 to 198 μm. And the thermal stability of the grains refined by Al2Ca is superior. The grain refining mechanism is attributed to the combined effects of solute and heterogeneous nucleation from the Al2Ca.
ISSN:1003-6326
DOI:10.1016/S1003-6326(16)64229-2