Effects of Di on Microstructure and Mechanical Properties of Mg-10Al Alloy

Liu Hongmei 1; Chen Yungui1; Tang Yongbai1; Huang Deming1; Niu Gao1; Tu Mingjing1; Li Yuguo2; Li Mingzhao3

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Effects of Di on Microstructure and Mechanical Properties of Mg-10Al Alloy
Issue 10, Pages: 618-620(2006)
Published： 2006 ，
DOI：

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[1]刘红梅,陈云贵,唐永柏,黄德明,牛高,涂铭旌,李益国,李明照.Di对Mg-10Al合金显微组织与力学性能的影响[J].特种铸造及有色合金,2006(10):618-620+603-604.

Liu Hongmei 1, Chen Yungui1, Tang Yongbai1, et al. Effects of Di on Microstructure and Mechanical Properties of Mg-10Al Alloy. [J]. Special Casting & Nonferrous Alloys (10):618-620(2006)
[1]刘红梅,陈云贵,唐永柏,黄德明,牛高,涂铭旌,李益国,李明照.Di对Mg-10Al合金显微组织与力学性能的影响[J].特种铸造及有色合金,2006(10):618-620+603-604. DOI：

Liu Hongmei 1, Chen Yungui1, Tang Yongbai1, et al. Effects of Di on Microstructure and Mechanical Properties of Mg-10Al Alloy. [J]. Special Casting & Nonferrous Alloys (10):618-620(2006) DOI：

摘要

研究了Di加入量为1%～3%（质量分数

下同）[Nd-Pr混合稀土金属

w（Nd）∶w（Pr）=3∶1]的Mg-10Al合金的显微组织和力学性能。通过显微组织分析发现Di加入Mg-10Al合金后

析出了块状的Al2（Nd

Pr）相及杆状的Al11（Nd

Pr）3相

合金组织得到细化。Di的加入使铸态的Mg-10Al合金的力学性能提高

在Di的加入量为2%时

块状的Al2（Nd

Pr）相占主导地位

合金的抗拉强度和伸长率都达到峰值。在Di的加入量达到3%时

杆状的Al11（Nd

Pr）3相增加

抗拉强度、尤其是伸长率有所降低。

Abstract

Effects of 1%～3% Di（Nd∶Pr=3∶1）addition on the microstructure and mechanical properties of Mg-10Al Mg alloys have been investigated.The results show that microstructure of the Mg-10Al alloy can be obviously refined due to the precipitation of bulky Al

（Nd

Pr）phase and rod Al

11（Nd

Pr）phase in the alloy with Di addition.Di can greatly improve the mechanical properties of as-cast Mg-10Al alloy.The maximum tensile strength and elongation of alloy can be observed with 2% Di addition due to bulky Al

（Nd

Pr）phase dominant in the matrix

while the tensile strength

especially elongation

is slightly decreased with 1% Di addition due to Al

11（Nd

Pr）phase increase.