Effect of Gd on the Microstructure and Mechanical Properties of Mg-6Al-1.2Y-0.9Nd Alloy

Chen Jun; Li Quan′an; Zhang Qing; Fu Sanling; Li Jianhong; Chen Xiaoya

doi:10.15980/j.tzzz.2014.05.033

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Effect of Gd on the Microstructure and Mechanical Properties of Mg-6Al-1.2Y-0.9Nd Alloy
Vol. 34, Issue 5, Pages: 453-456(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.05.033

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[1]陈君,李全安,张清,付三玲,李建宏,陈晓亚.Gd对Mg-6Al-1.2Y-0.9Nd合金组织和性能的影响[J].特种铸造及有色合金,2014,34(05):453-456.

Chen Jun, Li Quan′an, Zhang Qing, et al. Effect of Gd on the Microstructure and Mechanical Properties of Mg-6Al-1.2Y-0.9Nd Alloy. [J]. Special Casting & Nonferrous Alloys 34(5):453-456(2014)
[1]陈君,李全安,张清,付三玲,李建宏,陈晓亚.Gd对Mg-6Al-1.2Y-0.9Nd合金组织和性能的影响[J].特种铸造及有色合金,2014,34(05):453-456. DOI： 10.15980/j.tzzz.2014.05.033.

Chen Jun, Li Quan′an, Zhang Qing, et al. Effect of Gd on the Microstructure and Mechanical Properties of Mg-6Al-1.2Y-0.9Nd Alloy. [J]. Special Casting & Nonferrous Alloys 34(5):453-456(2014) DOI： 10.15980/j.tzzz.2014.05.033.

摘要

采用光学金相、扫描电镜、X射线衍射分析和力学性能测试等手段

研究了稀土元素Gd对Mg-6Al-1.2Y-0.9Nd合金微观组织和力学性能的影响。结果表明

Gd的添加并没有细化Mg-6Al-1.2Y-0.9Nd合金的晶粒尺寸

但晶粒尺寸保持在较小的范围内

合金显微组织有所粗化。Gd含量为3.6%时

合金的室温及高温强度达到最大值。Gd的添加对Mg-6Al-1.2Y-0.9Nd合金的高温力学性能有一定改善

尤其是200℃时的力学性能提高较明显

但过量的稀土元素添加使得Mg-6Al合金的强化作用减弱。

Abstract

Effects of Gd addition on microstructure and mechanical properties of Mg-6Al-1.2Y-0.9Nd alloy were investigated by optical microscopy（OM）

scanning electronic microscopy（SEM）

tensile tests and XRD（X-ray diffraction）analysis.The results reveal that the refinement of microstructure in the alloy can not be observed

and the grain size is increased with keeping in a small size range.With 3.6% Gd addition

the tensile strength of the alloy at room and high temperature reaches up to the maximum value.The mechanical properties of Mg-6Al-1.2Y-0.9Nd alloy is slightly improved at 20

75℃

and the mechanical properties are improved apparently at 200℃.However

the excessive addition of rare elements may weaken the strengthening effect on Mg-6Al alloy.