Effects of Zn and Gd contents and their ratios on microstructure and mechanical properties of as-cast and as-extruded Mg-8Li alloys

被引：2

作者：

Huang, Yu-chuan ^{[1
,2
,3
,4
]}

Zhang, Quan-da ^{[1
,2
]}

Ouyang, Si-jie ^{[3
]}

Sun, Fu-zhen ^{[1
,2
]}

Sun, Jia-wei ^{[3
,4
]}

Li, Hui-yu ^{[1
]}

Wu, Guo-hua ^{[4
]}

Chen, Pei-jun ^{[5
]}

Liu, Wen-cai ^{[3
,4
]}

机构：

[1] China Acad Machinery Sci & Technol Grp Co Ltd, State Key Lab Adv Forming Technol & Equipment, Beijing 100083, Peoples R China

[2] Beijing Natl Innovat Inst Lightweight Ltd, Beijing 100083, Peoples R China

[3] Shanghai Jiao Tong Univ, Natl Engn Res Ctr Light Alloy Net Forming, Shanghai 200240, Peoples R China

[4] Shanghai Jiao Tong Univ, Sch Mat Sci & Engn, State Key Lab Met Matrix Composites, Shanghai 200240, Peoples R China

[5] Luoyang Shengya Magnesium Alloy Technol Co Ltd, Luoyang 471921, Peoples R China

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2024年 / 34卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Mg-Li alloy; extrusion deformation; bi-modal structure; dispersion strengthening; MG-LI ALLOY; DEFORMATION-BEHAVIOR; ICOSAHEDRAL PHASE; TEXTURE;

D O I：

10.1016/S1003-6326(23)66435-0

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of contents of Zn and Gd elements and their mass ratios on microstructure and mechanical properties of as-cast and as-extruded Mg-8Li alloys were investigated. After extrusion, the precipitates are broken, and fine spherical particles with size about 100 nm are found to disperse in the beta-Li. The bi-modal structure consisting of long-strip-like coarse-grain alpha-Mg and recrystallized fine-grain beta-Li is formed. The strength and plasticity of the alloys are greatly improved after extrusion, and the YS and UTS increase with the increase of Zn and Gd contents. The Mg-8Li-8Zn-2Gd alloy exhibits an optimum comprehensive performance with the YS of 274 MPa, UTS of 283 MPa, and EL of 39.9%. The bi-modal structure strengthening consisting of the fine crystal strengthening of beta-Li and texture strengthening of alpha-Mg, and the dispersion strengthening of precipitations are the main strengthening mechanisms.

引用

页码：798 / 811

页数：14

共 37 条

[1] Deformation behavior of Mg-Zn-Y alloys reinforced by icosahedral quasicrystalline particles [J].