Effects of Nd Addition on Microstructure and Mechanical Properties of Squeezing Casting Magnesium Alloys

Xia Pengju; Zhang Hui; Yang Hongwei

doi:10.15980/j.tzzz.2014.09.059

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Effects of Nd Addition on Microstructure and Mechanical Properties of Squeezing Casting Magnesium Alloys
Vol. 34, Issue 9, Pages: 951-954(2014)
Published： 2014 ，
DOI： 10.15980/j.tzzz.2014.09.059

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[1]夏鹏举,张会,杨宏伟.Nd对挤压铸造镁合金组织和力学性能的影响[J].特种铸造及有色合金,2014,34(09):951-954.

Xia Pengju, Zhang Hui, Yang Hongwei. Effects of Nd Addition on Microstructure and Mechanical Properties of Squeezing Casting Magnesium Alloys. [J]. Special Casting & Nonferrous Alloys 34(9):951-954(2014)
[1]夏鹏举,张会,杨宏伟.Nd对挤压铸造镁合金组织和力学性能的影响[J].特种铸造及有色合金,2014,34(09):951-954. DOI： 10.15980/j.tzzz.2014.09.059.

Xia Pengju, Zhang Hui, Yang Hongwei. Effects of Nd Addition on Microstructure and Mechanical Properties of Squeezing Casting Magnesium Alloys. [J]. Special Casting & Nonferrous Alloys 34(9):951-954(2014) DOI： 10.15980/j.tzzz.2014.09.059.

摘要

镁合金经Ca合金化处理和稀土Nd变质处理后

在100MPa压力下挤压铸造成形

研究了Nd对Mg-8Al-1.0Ca合金组织和性能的影响。经XRD扫描及EDS能谱分析发现

通过挤压铸造

使得镁合金晶粒细化

有利于位错形成

析出相变得均匀细小

力学性能明显改善;当Nd添加量为0.4%时

镁抗拉强度达到230MPa

屈服强度为121MPa

伸长率为4.8%

合金性能达到最佳

较未变质时分别提高了28%、61%和78%。

Abstract

Magnesium alloy was treated by compound Ca alloying addition and Nd modification

and then it was formed by squeezing casting at 100 MPa to understand effects of Nd on microstructure and mechanical properties of the alloy by XRD（X-ray diffraction）and EDS.The results reveal that grain size in the squeezing casting alloy is refined

and dislocation is easily generated with the uniform fine precipitation phase

greatly improving the mechanical properties of the alloy.With 0.4% Nd addition

the mechanical properties of the alloy exhibit desirable

where tensile strength

yield strength and elongation reach 230 MPa

121MPa and 4.8%

respectively

increased by 28%

61%and 78%

respectively.