Cu对Mg-Zn-Y合金组织和力学性能的影响

万铭俊; 尧军平; 张磊

doi:10.15980/j.tzzz.2015.02.035

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Cu对Mg-Zn-Y合金组织和力学性能的影响
Effects of Cu on Microstructure and Mechanical Properties of Mg-Zn-Y Alloy
2015年35卷第2期页码：222-224
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.02.035

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[1]万铭俊,尧军平,张磊.Cu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,2015,35(02):222-224.

Wan Mingjun, Yao Junping, Zhang Lei. Effects of Cu on Microstructure and Mechanical Properties of Mg-Zn-Y Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(2):222-224.
[1]万铭俊,尧军平,张磊.Cu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,2015,35(02):222-224. DOI： 10.15980/j.tzzz.2015.02.035.

Wan Mingjun, Yao Junping, Zhang Lei. Effects of Cu on Microstructure and Mechanical Properties of Mg-Zn-Y Alloy[J]. Special Casting & Nonferrous Alloys, 2015,35(2):222-224. DOI： 10.15980/j.tzzz.2015.02.035.

摘要

以Mg93Zn6Y1合金作为研究对象

主要研究了Cu对铸态Mg93Zn6Y1合金组织和力学性能的影响。结果表明

Cu的引入使得Mg93Zn6Y1合金的铸态组织得到显著细化。铸态Mg91.5Zn6Y1Cu1.5合金中的共晶组织[α-Mg+I-Mg3Zn6Y相+MgZnCu相（Laves相）]呈连续网状分布在枝晶和晶界间。合金的室温和高温（200℃）力学性能均得到提高。室温和高温下

铸态Mg91.5Zn6Y1Cu1.5合金的抗拉强度和伸长率分别为178 MPa、3.8%和153 MPa、10.6%

相比基本合金

分别提高了10.5%、40.7%和26.4%、49.3%。

Abstract

Effects of Cu on microstructure and mechanical properties of as-cast Mg93Zn6Y1 alloy were investigated.The results show that with the addition of Cu

the microstructure of as-cast Mg93Zn6Y1 alloy is refined significantly

and the eutectic phase

such asα-Mg+ Mg3Zn6 Y phase（I-phase）+ MgZnCu phase（Laves phase）in as-cast Mg91.5Zn6Y1Cu1.5alloy

is distributed in form of continuous net-like structure in the dendrites and the grain boundary.The mechanical properties of as-cast Mg93Zn6Y1 alloy are improved with Cu addition at room temperature and elevated temperature.The tensile strength and elongation of as-cast Mg91.5Zn6Y1Cu1.5alloy at room temperature and elevated temperature reach up to 178 MPa

3.8% and 153 MPa

10.6%

respectively

compared with those of Mg93Zn6Y1 alloy

increased by10.5%

40.7% and 26.4%

49.3%

respectively.