Ca对Mg-Zn-Y合金组织和力学性能的影响

李青林; 范佳鹏; 刘杨; 李龙; 张磊

doi:10.15980/j.tzzz.2021.11.016

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Ca对Mg-Zn-Y合金组织和力学性能的影响
Effects of Ca on Microstructure and Mechanical Properties of Mg-Zn-Y Alloy
2021年41卷第11期页码：1407-1410
纸质出版日期： 2021 ，
DOI： 10.15980/j.tzzz.2021.11.016

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李青林, 范佳鹏, 刘杨, 等. Ca对Mg-Zn-Y合金组织和力学性能的影响[J]. 特种铸造及有色合金杂志, 2021,41(11):1407-1410.

Li Qinglin, Fan Jiapeng, Liu Yang, et al. Effects of Ca on Microstructure and Mechanical Properties of Mg-Zn-Y Alloy[J]. Special Casting & Nonferrous Alloys, 2021,41(11):1407-1410.
李青林, 范佳鹏, 刘杨, 等. Ca对Mg-Zn-Y合金组织和力学性能的影响[J]. 特种铸造及有色合金杂志, 2021,41(11):1407-1410. DOI： 10.15980/j.tzzz.2021.11.016.

Li Qinglin, Fan Jiapeng, Liu Yang, et al. Effects of Ca on Microstructure and Mechanical Properties of Mg-Zn-Y Alloy[J]. Special Casting & Nonferrous Alloys, 2021,41(11):1407-1410. DOI： 10.15980/j.tzzz.2021.11.016.

摘要

在准晶增强Mg

合金中添加Ca

研究了Ca含量对合金凝固组织和力学性能的影响。结果表明

添加Ca能够显著改善合金的凝固组织。随着Ca含量增加

合金中初生α-Mg相的晶粒尺寸逐渐降低

第二相形貌由粗大的骨骼状转变为不连续网状

其体积分数也逐渐减小。另外

随着Ca含量增加

合金的室温力学性能逐渐提高。当添加0.4%的Ca时

合金的抗拉强度和伸长率分别达到221 MPa和4.2%

和未添加Ca的合金相比分别提高了66.2%和90.9%。

Abstract

The effects of Ca on the microstructure and mechanical properties of Mg

alloy containing icosahedral quasicrystals phase（I-phase） were investigated. The results show that the microstructures of alloys are refined by Ca addition. The grain size of primary α-Mg phase is further decreased with increasing in Ca contents.Moreover

the morphology of second phase is changed from thick skeletal to discontinuous reticular

and the volume fraction of the second phase is further reduced.The mechanical properties of the alloys are further enhanced with the increase of Ca contents. With 0.4%Ca addition

the tensile strength and elongation of the alloy reach 221 MPa and 4.2%

respectively

which are increased by 66.2% and 90.9% compared with those of the Mg

alloy.