Effects of rare-earth elements Gd and Y on the solid solution strengthening of Mg alloys
Effects of rare-earth elements Gd and Y on the solid solution strengthening of Mg alloys
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稀土元素Gd和Y对镁合金固溶强化的影响
DOI：
10.1016/j.jallcom.2009.02.131
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发表时间：
2009-07-29
影响因子：
6.2
通讯作者：
Han, E. H.
中科院分区：
文献类型：
--
作者：
Gao, L.;Chen, R. S.;Han, E. H.
本文研究了Mg-Gd、Mg-Y二元和Mg-Gd-Y三元合金的固溶强化效率。发现固溶体中的钆和钇的屈服强度都与溶质原子浓度c（n）有关，其中c为溶质原子浓度，n = 1/2或2/3。这种简化的分析表明，我们能够令人满意地预测三元固溶体在Mg-Gd-Y合金的强化。发现固溶体中的Gd和Y比Al和Zn提供高得多的强化效果。据建议，除了经典的尺寸和/或模量失配模型，价态效应可以解释Gd和Y在Mg中的增强强化。(C)2009 Elsevier B. V.保留所有权利。
A number of Mg-Gd, Mg-Y binary and Mg-Gd-Y ternary alloys are investigated in terms of solid solution strengthening efficiency in this work. It is found that both gadolinium and yttrium in solid solution give a c(n) concentration dependence of the yield strength, where c is the solute atom concentration and n = 1/2 or 2/3. This simplified analysis illustrates that we are able to satisfactorily predict the ternary solid solution strengthening in Mg-Gd-Y alloys. Gd and Y in solid solution are found to give a considerably higher strengthening effect than Al and Zn. It is suggested that, in addition to the classical size and/or modulus misfits model, the valency effect may account for the enhanced strengthening of Gd and Y in Mg. (C) 2009 Elsevier B.V. All rights reserved.