Microstructure and phase compositions of as-cast Mg-3.9Zn-0.6RE (Gd, Y) alloy with different Gd/Y ratios

被引：18
|
作者：
Yang, Yang [1 ]
Zhang, Kui [1 ]
Ma, Ming-Long [1 ]
Yuan, Jia-Wei [1 ]
机构：
[1] Gen Res Inst Nonferrous Met, State Key Lab Fabricat & Proc Nonferrous Met, Beijing 100012, Peoples R China
来源：
RARE METALS | 2015年 / 34卷 / 03期
基金：
中国国家自然科学基金;
关键词：
Mg-Zn-RE alloy; Icosahedral quasicrystalline; Microstructure; Atomic ratio; MECHANICAL-PROPERTIES; ZN; EXTRUSION; NACL;
D O I：
10.1007/s12598-014-0444-7
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Mg-Zn-RE (Gd, Y) alloys with different Gd/Y atomic ratios were prepared by conventional casting, and the microstructure of the alloys was studied by multiple means. Icosahedral quasicrystal phases are observed in all alloys. The different Gd/Y atomic ratios affect the microstructures of the alloys irregularly. The alloy with more Gd has large dendritic structure and more complicated phase composition which are composed of I-phase lamellar eutectic, W-phase divorced eutectic, Mg-RE cuboid particles and Mg-Zn binary phases. Other two alloys show similar microstructures and phase compositions with very thin lamellar eutectics which distribute along the interdendritic region, and the lamellar eutectics are formed by I-phase and Mg. The element contents of the I-phases and Mg-RE phases are partially controlled by the Gd/Y atomic ratio.
引用
收藏
页码：160 / 163
页数：4
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