Preparation of high strength Mg-Li-Zn-Y alloy by MgLi2Zn precipitation

被引：28

作者：

Wei, Zhen ^{[1
]}

Dong, Hao ^{[1
]}

Zhang, Jinghuai ^{[1
]}

Wu, Ruizhi ^{[1
]}

He, Yuying ^{[1
]}

Bao, Rirong ^{[1
]}

Zhang, Xiaobo ^{[2
]}

Wang, Jiahao ^{[3
]}

机构：

[1] Harbin Engn Univ, Coll Mat Sci & Chem Engn, Key Lab Superlight Mat & Surface Technol, Minist Educ, Harbin 150001, Peoples R China

[2] Nanjing Inst Technol, Jiangsu Key Lab Adv Struct Mat & Applicat Technol, Nanjing 211167, Peoples R China

[3] Jiangxi Acad Sci, Inst Appl Phys, Nanchang 330096, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 890卷

基金：

黑龙江省自然科学基金; 中国国家自然科学基金;

关键词：

Mg-Li alloys; Cryogenic rolling; Dislocation cutting; Strengthening mechanism; Semi-coherent precipitation; MECHANICAL-PROPERTIES; MAGNESIUM ALLOY; TENSILE PROPERTIES; MICROSTRUCTURE; BEHAVIOR; GD; RECRYSTALLIZATION; TEMPERATURE; EVOLUTION; YTTRIUM;

D O I：

10.1016/j.msea.2023.145842

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

For ultralight Mg-Li alloys, the improvement of strength is the most concerned issue. In this work, we successfully realize the incredible enhancement of strength in the Mg-8.5Li-7.5Zn-1.5Y alloy via a series of preparation processes, and the excellent tensile properties containing high yield strength of 312.4 MPa and good elongation of 14.2 % are obtained. Yield strength increment is as high as 213 MPa through deformation processing, which is rarely reported in Mg-Li alloys. Qualitative and quantitative studies reveal that the dislocation cutting of semi-coherent MgLi2Zn nano-precipitates is mainly responsible for such a high yield strength. The new finding for strengthening way is expected to contribute to the design of high-performance Mg-Li alloys.

引用

页数：8

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