Microstructure and Mechanical Properties of As-cast Mg-Er-Zn-Zr Alloys

Yin Jian; Ma Xiujun; Dai Binyu; Yuan Ke

doi:10.15980/j.tzzz.2015.01.032

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Microstructure and Mechanical Properties of As-cast Mg-Er-Zn-Zr Alloys
Vol. 35, Issue 1, Pages: 106-109(2015)
Published： 2015 ，
DOI： 10.15980/j.tzzz.2015.01.032

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[1]尹健,马修军,戴斌煜,袁柯.Zn对铸态Mg-Er-Zr合金组织和性能的影响[J].特种铸造及有色合金,2015,35(01):106-109.

Yin Jian, Ma Xiujun, Dai Binyu, et al. Microstructure and Mechanical Properties of As-cast Mg-Er-Zn-Zr Alloys. [J]. Special Casting & Nonferrous Alloys 35(1):106-109(2015)
[1]尹健,马修军,戴斌煜,袁柯.Zn对铸态Mg-Er-Zr合金组织和性能的影响[J].特种铸造及有色合金,2015,35(01):106-109. DOI： 10.15980/j.tzzz.2015.01.032.

Yin Jian, Ma Xiujun, Dai Binyu, et al. Microstructure and Mechanical Properties of As-cast Mg-Er-Zn-Zr Alloys. [J]. Special Casting & Nonferrous Alloys 35(1):106-109(2015) DOI： 10.15980/j.tzzz.2015.01.032.

摘要

采用光学显微镜、X射线衍射、差热分析和力学性能测试等

研究了铸态Mg-12Er-xZn-0.6Zr（x=0

0.6

1.8

摩尔分数

%）合金的显微组织和力学性能。结果表明

Mg-12Er-0.6Zr合金主要由α-Mg相组成

晶内出现成分偏析。添加0.6%的Zn后

合金晶粒明显细化

且出现X相（Mg12ErZn）。增加Zn含量至1.8%

合金晶粒大小和相组成未发生明显变化

而X相体积分数明显增加。添加Zn元素

显著提高了Mg-12Er-0.6Zr合金的屈服强度和抗压强度。随着Zn含量的增加

合金的伸长率呈下降趋势

但下降幅度较小。

Abstract

Microstructure and mechanical properties of as-cast Mg-12Er-xZn-0.6Zr（x=0

0.6%

1.8%）alloys were investigated using optical microscope（OM）

X-ray diffraction（XRD）

DSC and compressive test.The results reveal that as-cast Mg-12Er-0.6Zr alloy is composed of singleα-Mg phase with composition segregation.With the addition of 0.6% Zn

the grain is refined and a new X phase（Mg12ErZn）can be observed.With the increase of Zn addition to 1.8%

the absence of grain size and phases change can be observed

however

the volumetric fraction of Xphase is increased significantly.The Zn addition can substantially improve the yield strength and fracture strength

while slightly decrease the plasticity of the alloy.