Y对Mg-Zn-Zr合金力学性能的影响

柴韶春; 孟奇; 杨润; 陈文振

doi:10.15980/j.tzzz.2019.07.004

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Y对Mg-Zn-Zr合金力学性能的影响
Effects of Alloying Element Y Content on Mechanical Properties of Mg-Zn-Zr Alloy Extrusion Sheet
2019年39卷第7期页码：711-715
纸质出版日期： 2019 ，
DOI： 10.15980/j.tzzz.2019.07.004

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[1]柴韶春,孟奇,杨润,陈文振.Y对Mg-Zn-Zr合金力学性能的影响[J].特种铸造及有色合金,2019,39(07):711-715.

Chai Shaochun, Meng Qi, Yang Run, et al. Effects of Alloying Element Y Content on Mechanical Properties of Mg-Zn-Zr Alloy Extrusion Sheet[J]. Special Casting & Nonferrous Alloys, 2019,39(7):711-715.
[1]柴韶春,孟奇,杨润,陈文振.Y对Mg-Zn-Zr合金力学性能的影响[J].特种铸造及有色合金,2019,39(07):711-715. DOI： 10.15980/j.tzzz.2019.07.004.

Chai Shaochun, Meng Qi, Yang Run, et al. Effects of Alloying Element Y Content on Mechanical Properties of Mg-Zn-Zr Alloy Extrusion Sheet[J]. Special Casting & Nonferrous Alloys, 2019,39(7):711-715. DOI： 10.15980/j.tzzz.2019.07.004.

摘要

研究了稀土元素Y对铸态与挤压态Mg-Zn-Y合金组织与力学性能的影响。通过铸造与挤压不同Y含量的Mg-Zn-Zr-Y合金并进行金相组织分析

发现Y的添加改变了镁合金中第二相的组成、形态和分布

细化了晶粒尺寸。同时对Mg-Zn-Zr-Y合金的力学性能进行了测试。结果表明

由于Y引入的三元化合物W相在热挤压过程中破碎并弥散分布

使得合金最终晶粒尺寸为5～7μm

极大提高了合金的力学性能。

Abstract

The influence of lanthanum（Y）content on microstructure and mechanical properties of the as-cast and extruded Mg-Zn-Y alloys was investigated systematically.By casting and extruding Mg-Zn-Zr-Y alloys with different Y contents and performing metallographic microscopic analysis

it is found that Y can change the composition

morphology and distribution of the second phase in the magnesium alloy

and refine the grain size.Meanwhile

the mechanical properties of Mg-Zn-Zr-Y alloy were measured.The results reveal that the W phase of the ternary compound introduced by Y is broken and dispersed in the alloy during hot extrusion process

so that the alloy finally obtains a fine grain structure with a size of 5～7μm

greatly improving the mechanical properties of the magnesium alloy.