Mn含量对Mg-5Al合金铸态组织和力学性能的影响

周桂斌; 刘子利; 刘希琴; 王怀涛; 李健

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Mn含量对Mg-5Al合金铸态组织和力学性能的影响
Effects of Mn Addition on Microstructure and Mechanical Properties of As-cast Mg-5Al Magneisum Alloy
2011年31卷第5期页码：461-464
纸质出版日期： 2011 ，
DOI：

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[1]周桂斌,刘子利,刘希琴,王怀涛,李健.Mn含量对Mg-5Al合金铸态组织和力学性能的影响[J].特种铸造及有色合金,2011,31(05):461-464+391.

Zhou Guibin1, Liu Zili1, Liu Xiqin1, et al. Effects of Mn Addition on Microstructure and Mechanical Properties of As-cast Mg-5Al Magneisum Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(5):461-464.
[1]周桂斌,刘子利,刘希琴,王怀涛,李健.Mn含量对Mg-5Al合金铸态组织和力学性能的影响[J].特种铸造及有色合金,2011,31(05):461-464+391. DOI：

Zhou Guibin1, Liu Zili1, Liu Xiqin1, et al. Effects of Mn Addition on Microstructure and Mechanical Properties of As-cast Mg-5Al Magneisum Alloy[J]. Special Casting & Nonferrous Alloys, 2011,31(5):461-464. DOI：

摘要

研究了合金元素Mn对Mg-5Al合金铸态组织和力学性能的影响。结果表明

在Mg-5Al合金中加入Mn后

合金组织细化

连续或半连续网状分布的β-Mg17Al12相逐渐转变为断续、分散的骨骼状相

晶界附近出现颗粒相并且数量逐渐增多。随着Mn含量增加

合金室温抗拉强度、伸长率及冲击韧度先上升然后下降。当Mn含量为0.3%时

合金综合力学性能最好

抗拉强度、伸长率与冲击韧度达到190MPa、7.3%与21.1J·cm-2

分别提高了7.9%、9.1%与9.3%。继续增加Mn含量至0.5%时

Al8Mn5颗粒聚集长大粗化

导致Mg-5Al合金综合力学性能下降。

Abstract

Effects of Mn addition on the microstructure and mechanical properties of as-cast Mg-5Al magnesium alloy were investigated.The results show that with Mn addition

grain size in the alloy is refined

and continuous or semi-continuous net-like β-Mg17Al12 phase are converted into discontinuous and dispersedly skeleton one

meanwhile

particle phase is generated in the grain boundary with increasing in numbers.With increasing in Mn addition

ambient tensile strength

elongation and impact toughness of the alloy exhibit firstly increase and then decrease.When Mn addition reaches 0.3%

tensile strength

elongation and impact toughness reach 190 MPa

7.3% and 21.1 J·cm-2

increased by 7.9%

9.1% and 9.3%

respectively.With increasing Mn addition to 0.5%