Effects of Gd on Microstructure and Properties of As-cast AZ31 Magnesium Alloy

Gu Songwei; Hao Hai; Zhang Aimin; Song Yingde; Zhang Xingguo

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Effects of Gd on Microstructure and Properties of As-cast AZ31 Magnesium Alloy
Vol. 31, Issue 5, Pages: 472-475(2011)
Published： 2011 ，
DOI：

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[1]谷松伟,郝海,张爱民,宋迎德,张兴国.Gd对铸态AZ31合金组织和性能的影响[J].特种铸造及有色合金,2011,31(05):472-475+391.

Gu Songwei, Hao Hai, Zhang Aimin, et al. Effects of Gd on Microstructure and Properties of As-cast AZ31 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 31(5):472-475(2011)
[1]谷松伟,郝海,张爱民,宋迎德,张兴国.Gd对铸态AZ31合金组织和性能的影响[J].特种铸造及有色合金,2011,31(05):472-475+391. DOI：

Gu Songwei, Hao Hai, Zhang Aimin, et al. Effects of Gd on Microstructure and Properties of As-cast AZ31 Magnesium Alloy. [J]. Special Casting & Nonferrous Alloys 31(5):472-475(2011) DOI：

摘要

研究了稀土元素Gd对铸态AZ31镁合金显微组织和力学性能的影响。结果表明

Gd的加入使AZ31合金中出现了颗粒状和块状的Al2Gd相

并使β-Mg17Al12相的含量减少

从而细化了AZ31铸态组织;0.8%的Gd的加入使合金的平均晶粒尺寸从约290μm减小到约140μm

合金的强度和伸长率分别提高到210MPa和18.3%。

Abstract

Effects of RE element Gd on microstructure and mechanical properties of as-cast AZ31 magnesium alloy were investigated.The results reveal that microstructure of the as-cast AZ31 magnesium alloy can be refined with Gd addition

resulting in the decrease of Mg17Al12 phase and occurrence of particle or polygonal Al2Gd phase.With 0.8% Gd addition

average grain size of the alloy is refined from approximately 290 μm to 140 μm

and tensile strength and elongation are improved to 210 MPa and by 18.3%

respectively.