Significant improvement in mechanical properties of Mg-Zn-La alloy by minor Ca addition

被引：18
|
作者：
Wang, Xin [1 ]
Du, Yuzhou [1 ,2 ]
Liu, Dongjie [1 ,2 ]
Jiang, Bailing [1 ,2 ]
机构：
[1] Xian Univ Technol, Sch Mat Sci & Technol, Xian 710048, Peoples R China
[2] Xian Univ Technol, Shaanxi Prov Engn Res Ctr Magnesium Alloys, Xian 710048, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2020年 / 160卷
基金：
中国国家自然科学基金;
关键词：
Mg-Zn-La; Dynamic recrystallization; Texture; Precipitates; Mechanical properties; DEFORMATION-BEHAVIOR; MAGNESIUM ALLOY; YIELD STRENGTH; MICROSTRUCTURE; TEXTURE; PARAMETERS; EVOLUTION; CERIUM;
D O I：
10.1016/j.matchar.2020.110130
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The microstructure and mechanical properties of a Mg-Zn-La alloy with and without Ca were investigated in the present study. Results indicated that small addition of Ca in Mg-Zn-La alloy induced the formation of Ca2Mg6Zn3 phase distributing at grain boundaries in the as-cast state and promoted dynamic precipitation in the as-extruded state. The existence of fine precipitates postponed dynamic recrystallization and refined dynamically recrystallized (DRXed) grains for Ca containing alloy. However, small addition of Ca did not affect the texture of the as-extruded Mg-Zn-La alloy obviously. The yield strength was increased by 70% after minor Ca addition from 141 MPa of the as-extruded Mg-Zn-La alloy to 241 MPa of the as-extruded Mg-Zn-La-Ca alloy. The significant increase of strength was mainly ascribed to refined microstructure and dynamic precipitates.
引用
收藏
页数：7
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