Effect of microalloying with Ca on the microstructure and mechanical properties of Mg-6 mass%Zn alloys

被引：122
作者：
Du, Y. Z. [1 ,2 ]
Qiao, X. G. [1 ]
Zheng, M. Y. [1 ]
Wang, D. B. [3 ]
Wu, K. [1 ]
Golovin, I. S. [4 ]
机构：
[1] Harbin Inst Technol, Sch Mat Sci & Engn, POB 433, Harbin 150001, Peoples R China
[2] Xian Univ Technol, Sch Mat Sci & Engn, Xian 710048, Peoples R China
[3] Maanshan Steel Co LTD, Res & Technol Ctr, Maanshan 243000, Peoples R China
[4] Natl Univ Sci & Technol MISIS, Leninsky Ave 4, Moscow 119049, Russia
来源：
MATERIALS & DESIGN | 2016年 / 98卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Mg-Zn-Ca alloy; Microalloying; Microstructure; Precipitates; Mechanical properties; DUCTILE MAGNESIUM ALLOYS; STRETCH FORMABILITY; ROOM-TEMPERATURE; WROUGHT MAGNESIUM; HIGH-STRENGTH; THERMAL-STABILITY; MN ALLOYS; AS-CAST; TEXTURE; CALCIUM;
D O I：
10.1016/j.matdes.2016.03.025
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The Mg-6 mass%Zn alloys microalloyed with different amounts of Ca were cast and extruded. The second phase in the as-cast Mg-6Zn alloy is Mg4Zn7, which is replaced by Ca2Mg6Zn3 with an increase of Ca addition. Microalloying by Ca affects the grain size, dynamic recrystallization, and dynamic precipitation of Mg-6Zn alloys during extrusion. The Ca addition inhibits dynamic recrystallization and grain growth clue to the pinning effect of fine precipitates, giving rise to fine dynamic recrystallized grains. A large amount of precipitates is observed in the Ca containing alloys after extrusion. Ca effectively improves strength of the as-extruded Mg-6Zn alloy, which is mainly attributed to refined dynamic recrystallized grains, dense precipitates, and deformed regions with high-density dislocations and strong basal texture. (C) 2016 Elsevier Ltd. All rights reserved.
引用
收藏
页码：285 / 293
页数：9
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