Microstructure evolution of Mg-10Gd-3Y-1.2Zn-0.4Zr alloy during heat-treatment at 773 K
Microstructure evolution of Mg-10Gd-3Y-1.2Zn-0.4Zr alloy during heat-treatment at 773 K
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DOI：
10.1016/j.jallcom.2008.01.078
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发表时间：
2009-01-22
影响因子：
6.2
通讯作者：
Ding, W. J.
中科院分区：
文献类型：
--
作者：
Li, D. J.;Zeng, X. Q.;Ding, W. J.
研究了 Mg-10Gd-3Y-1.2Zn-0.4Zr 合金在 773 K 高温热处理 12-72 小时期间的微观组织演变。添加1.2%的Zn增加了铸态合金中Mg-5(Gd,Y,Zn)共晶化合物的含量和Mg晶体基面堆垛层错(SF)的形成。在773 K热处理过程中，随着时间的延长，部分共晶化合物逐渐溶解到基体中，形成新的14H型LPSO和Fe结构的长方体富稀土相。这些 14H LPSO 相通过热处理控制由 Mg-5(Gd,Y,Zn) 共晶化合物转变产生两种形态：块状和细片状。 (C) 2008 Elsevier B.V. 保留所有权利。
Microstructure evolution of Mg-10Gd-3Y-1.2Zn-0.4Zr alloy during high temperature heat-treatment at 773 K in the time range 12-72h is investigated. Addition of 1.2% Zn increases the amount of Mg-5(Gd,Y, Zn) eutectic compounds and form of basal plane stacking faults (SF) of Mg crystal in the as-cast alloy. During heat-treatment at 773 K, parts of eutectic compounds dissolve gradually into the matrix with time prolonged, a new 14H type of LPSO and fee structured cuboid-shaped RE-rich phases come into being. Two kinds of morphologies of these 14H LPSO phases: block-shaped and fine lamellar-shaped are generated through transformation from Mg-5(Gd,Y, Zn) eutectic compounds by heat treatment control. (C) 2008 Elsevier B.V. All rights reserved.