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

页码：160 / 163

页数：4

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