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。
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.
作者
柴韶春
孟奇
杨润
陈文振
Chai Shaochun;Meng Qi;Yang Run;Chen Wenzhen(Zibo Deyuan Metal Materials Co.,Ltd.;School of Material Science and Engineering,Harbin Institute of Technology(Weihai))
出处
《特种铸造及有色合金》
CAS
北大核心
2019年第7期711-715,共5页
Special Casting & Nonferrous Alloys
关键词
稀土元素
挤压
细晶组织
力学性能
Rare Earth Element
Extrusion
Fine Grain Structure
Mechanical Properties
