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

被引：19

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

共 19 条

[1] Texture and stretch formability of rolled Mg-Zn-RE(Y, Ce, and Gd) alloys at room temperature [J].

Cai, Zheng-Xu ;

Jiang, Hai-Tao ;

Tang, Di ;

Ma, Zhao ;

Kang, Qiang .

RARE METALS, 2013, 32 (05) :441-447

[2]

[郭永春 Guo Yongchun], 2014, [稀有金属, Chinese Journal of Rare Metals], V38, P603

[3] The effect of nanoquasicrystals on mechanical properties of as-extruded Mg-Zn-Gd alloy [J].

Huang, Hua ;

Kato, Hidemi ;

Chen, Chunlin ;

Wang, Zhongchang ;

Yuan, Guangyin .

MATERIALS LETTERS, 2012, 79 :281-283

[4] The corrosion behaviors of Mg-7Gd-5Y-1Nd-0.5Zr alloy under (NH4)(2)SO4, NaCl and Ca(NO3)(2) salts spray condition [J].

Jiang, Quantong ;

Zhang, Kui ;

Li, Xinggang ;

Li, Yongjun ;

Ma, Minglong ;

Shi, Guoliang ;

Yuan, Jiawei .

JOURNAL OF MAGNESIUM AND ALLOYS, 2013, 1 (03) :230-234

[5]

[李尧 Li Yao], 2014, [稀有金属, Chinese Journal of Rare Metals], V38, P973

[6] Deformation behavior of Mg-Zn-Gd-based alloys reinforced with quasicrystal and Laves phases at elevated temperatures [J].

Liu, Yong ;

Yuan, Guangyin ;

Ding, Wenjiang ;

Lu, Cheng .

JOURNAL OF ALLOYS AND COMPOUNDS, 2007, 427 (1-2) :160-165

[7] Stable icosahedral phase in Mg-Zn-Gd alloy [J].

Liu, Yong ;

Yuan, Guangyin ;

Lu, Chen ;

Ding, Wenjiang .

SCRIPTA MATERIALIA, 2006, 55 (10) :919-922

[8] ON THE STABLE QUASI-CRYSTALS ZN SLOWLY COOLED MG-ZN-Y ALLOYS [J].

LUO, ZP ;

ZHANG, SQ ;

TANG, YL ;

ZHAO, DS .

SCRIPTA METALLURGICA ET MATERIALIA, 1995, 32 (09) :1411-1416

[9] Thermodynamic modelling of the Y-Zn and Mg-Zn-Y systems [J].

Shao, G. ;

Varsani, V. ;

Fan, Z. .

CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2006, 30 (03) :286-295

[10] Microstructure of ZM6 magnesium alloy with different Nd content [J].

Shi, Weng-Yong ;

Ma, Yan .

RARE METALS, 2013, 32 (03) :234-240

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