Effects of Erbium Addition on Microstructure and Mechanical Properties of As-cast Mg-Al-Zn-Mn Magnesium Alloys

Xiao Daihong; Song Min; Chen Kanghua; Huang Boyun

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Effects of Erbium Addition on Microstructure and Mechanical Properties of As-cast Mg-Al-Zn-Mn Magnesium Alloys
Issue 11, Pages: 824-826(2007)
Published： 2007 ，
DOI：

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[1]肖代红,宋旼,陈康华,黄伯云.Er对铸态Mg-Al-Zn-Mn合金组织与力学性能的影响[J].特种铸造及有色合金,2007(11):824-826+815.

Xiao Daihong, Song Min, Chen Kanghua, et al. Effects of Erbium Addition on Microstructure and Mechanical Properties of As-cast Mg-Al-Zn-Mn Magnesium Alloys. [J]. Special Casting & Nonferrous Alloys (11):824-826(2007)
[1]肖代红,宋旼,陈康华,黄伯云.Er对铸态Mg-Al-Zn-Mn合金组织与力学性能的影响[J].特种铸造及有色合金,2007(11):824-826+815. DOI：

Xiao Daihong, Song Min, Chen Kanghua, et al. Effects of Erbium Addition on Microstructure and Mechanical Properties of As-cast Mg-Al-Zn-Mn Magnesium Alloys. [J]. Special Casting & Nonferrous Alloys (11):824-826(2007) DOI：

摘要

通过熔炼铸造法制备了不同Er含量的铸态Mg-9.0Al-0.8Zn-0.15Mn合金。采用X射线衍射、金相观察、扫描电镜及拉伸性能测试

研究了Er的添加对合金的显微组织与力学性能影响。结果显示

基体合金中添加Er后

显微组织主要由α-Mg相、Mg17Al12相及Al3Er相组成。添加Er元素能有效细化铸态合金的晶粒

使其平均晶粒尺寸从57μm降低到21μm;同时Er的添加改善了基体合金中MgAl相的形态与分布

最终使基体合金的室温抗拉强度得到提高。

Abstract

Mg-9.0Al-0.8Zn-0.15Mn magnesium alloy with different erbium contents was prepared by ingot metallurgy.The effects of erbium additions on the microstructure and mechanical properties have been investigated by means of X-ray diffraction

optical microscope

scanning electron microscope and tensile testing.The results reveal that the microstructures of the alloy with different erbium additions are mainly composed of α-Mg phase

Mg17Al12 phase and Al3Er.Meanwhile

the grain size can be refined from 57 μm to 21 μm.In addition

the ambient tensile properties of the alloy can be improved obviously as a result of the improvement of morphology and distribution of Mg17Al12 phase in the alloy.