Sr和Zr对Mg-Y-Cu合金凝固组织与力学性能的影响

章森; 周全; 张浩; 黄曼青

doi:10.15980/j.tzzz.2015.09.024

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Sr和Zr对Mg-Y-Cu合金凝固组织与力学性能的影响
Effect of Sr and Zr on Solidified Structure and Mechanical Properties of Mg-Y-Cu Alloy Reinforced by Long Period Ordered Structure
2015年35卷第9期页码：981-984
纸质出版日期： 2015 ，
DOI： 10.15980/j.tzzz.2015.09.024

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[1]章森,周全,张浩,黄曼青.Sr和Zr对Mg-Y-Cu合金凝固组织与力学性能的影响[J].特种铸造及有色合金,2015,35(09):981-984.

Zhang Sen, Zhou Quan, Zhang Hao, et al. Effect of Sr and Zr on Solidified Structure and Mechanical Properties of Mg-Y-Cu Alloy Reinforced by Long Period Ordered Structure[J]. Special Casting & Nonferrous Alloys, 2015,35(9):981-984.
[1]章森,周全,张浩,黄曼青.Sr和Zr对Mg-Y-Cu合金凝固组织与力学性能的影响[J].特种铸造及有色合金,2015,35(09):981-984. DOI： 10.15980/j.tzzz.2015.09.024.

Zhang Sen, Zhou Quan, Zhang Hao, et al. Effect of Sr and Zr on Solidified Structure and Mechanical Properties of Mg-Y-Cu Alloy Reinforced by Long Period Ordered Structure[J]. Special Casting & Nonferrous Alloys, 2015,35(9):981-984. DOI： 10.15980/j.tzzz.2015.09.024.

摘要

研究了Sr和Zr对长周期结构增强Mg97Y2Cu1合金凝固组织和力学性能的影响。结果表明

合金中0.1%的Sr或0.8%的Zr能够细化其凝固组织

提高力学性能

且Sr和Zr复合添加的作用效果更好。复合添加Sr和Zr时

合金的初生相变成细小的等轴晶或蔷薇状晶体

第二相分布最为均匀

且分布在晶界上的第二相体积含量有较大幅度提高;合金的抗拉强度和伸长率分别为222.5 MPa和10.7%

较未合金化处理的试样分别提高了29%和84%。

Abstract

Influences of Sr and Zr on solidified structure and mechanical properties of Mg97Y2Cu1 alloy reinforced by long period ordered structure were investigated.The results show that with 0.1%Sr or0.8% Zr addition

solidified structure can be refined

and mechanical properties of the alloy can be improved

especially combined addition of Sr and Zr.With the combined addition of Sr and Zr

primary phase in the alloy is transformed into fine equiaxed grains or rosette ones with the uniform distribution of the second phase

meanwhile

its volume fraction along grain boundary is increased greatly.The tensile strength and elongation of the alloy reach 222.5MPa and 10.7%

which are increased by up to 29%and84%

respectively

compared with the alloy without treatment.