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

被引：119

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：

中国博士后科学基金; 中国国家自然科学基金;

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

页码：285 / 293

页数：9

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