Effect of Be on the Microstructure and Mechanical Properties of Cast Mg Alloy

Zhao Yunhu

doi:10.15980/j.tzzz.2000.03.004

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Effect of Be on the Microstructure and Mechanical Properties of Cast Mg Alloy
Issue 3, Pages: 10-12(2000)
Published： 2000 ，
DOI： 10.15980/j.tzzz.2000.03.004

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[1]赵云虎,王渠东,丁文江,曾小勤,吕宜振,朱燕萍.Be对铸造Mg合金组织和力学性能的影响[J].特种铸造及有色合金,2000(03):10-12+3-2.

Zhao Yunhu. Effect of Be on the Microstructure and Mechanical Properties of Cast Mg Alloy. [J]. Special Casting & Nonferrous Alloys (3):10-12(2000)
[1]赵云虎,王渠东,丁文江,曾小勤,吕宜振,朱燕萍.Be对铸造Mg合金组织和力学性能的影响[J].特种铸造及有色合金,2000(03):10-12+3-2. DOI： 10.15980/j.tzzz.2000.03.004.

Zhao Yunhu. Effect of Be on the Microstructure and Mechanical Properties of Cast Mg Alloy. [J]. Special Casting & Nonferrous Alloys (3):10-12(2000) DOI： 10.15980/j.tzzz.2000.03.004.

摘要

研究了在Mg 9Al 0 .5Zn 1RE合金中添加Be后合金组织和力学性能的变化规律。Be的加入对γ相有一定的变质作用

γ相的形状和分布随Be含量的变化而变化。Be的加入量少时

合金的常温抗拉强度σb

σ0 .2 与伸长率δ都有所下降 ;当Be的加入量增加到一定程度时

这些性能指标反而升高。继续加入时

性能又会下降。高温拉伸性能的变化趋势与常温时相同。Be的加入对α Mg基体的显微硬度影响不大。

Abstract

Variation law of microstructure and mechanical properties of Be added cast Mg alloy is studied. Be addition has some effect on γ phase modification. Form and distribution of γ phase varied with Be content variation. Ambient tensile strength and elongation of alloy decreased with low Be addition while Be addition reached some degree

these properties index will increase. But it decreased with continuously adding Be. Variation law of the tensile strength and elongation at high temperature is as same as that of those properties at room temperature. Be addition has slight effect on the micro-hardness of α -Mg matrix.