INFLUENCE OF ZR ON THE GRAIN-REFINEMENT OF ALUMINUM

被引：0
|
作者：
JOHNSSON, M
机构：
来源：
ZEITSCHRIFT FUR METALLKUNDE | 1994年 / 85卷 / 11期
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中图分类号：
TF [冶金工业];
学科分类号：
0806 ;
摘要：
The influence of Zr on the grain refinement of aluminium after additions of Ti and B is discussed for Zr concentrations both below and above the peritectic (0.11 mass%). For hypoperitectic concentrations it is found that Zr and Ti in solution cooperate in promoting a fine-grained structure. At hyperperitectic Zr concentrations a deterioration occurs in the grain refinement due to formation of a mixed aluminide phase (Ti1-xZrx)Al3 that removes dissolved Ti from the melt. Presence of this phase results in a lowering of the total growth-restricting effect by solutes on the growth rate of the alpha-Al dendrites.
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页码：786 / 789
页数：4
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