The microstructure, texture and mechanical properties of extruded Mg-5.3Zn-0.2Ca-0.5Ce (wt%) alloy

被引：130

作者：

Du, Y. Z. ^{[1
]}

Qiao, X. G. ^{[1
]}

Zheng, M. Y. ^{[1
]}

Wu, K. ^{[1
]}

Xu, S. W. ^{[2
]}

机构：

[1] Harbin Inst Technol, Sch Mat Sci & Engn, Harbin 150001, Peoples R China

[2] Baosteel Grp Corp, R&D Ctr, Res Inst, Shanghai 201900, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 620卷

基金：

中国国家自然科学基金;

关键词：

Mg-Zn-Ca-Ce alloy; Microalloying; Precipitates; Texture; MG-ZN; HIGH-STRENGTH; MAGNESIUM ALLOY; NEUTRON-DIFFRACTION; CORROSION BEHAVIOR; CALCIUM ADDITIONS; MN ADDITION; CA; CREEP; CERIUM;

D O I：

10.1016/j.msea.2014.10.028

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Mg-5.3 wt%Zn alloy microalloyed with 0.2 wt%Ca and 0.5 wt%Ce was extruded, and the microstructure, texture and mechanical properties of the as-extruded alloy were investigated. The undissolved coarse T-1'during homogenization treatment stimulated nucleation of dynamic reaystallization (DRX) grains during extrusion. The double microalloying with Ca and Ce promoted the dynamic precipitation, resulting in high density precipitates after hot extrusion. Fine Ca2Mg6Zn3 particles precipitated dynamically at the grain boundaries (GBs) could effectively hinder the grain growth during hot extrusion. A weaker texture in DRXed grains was attributed to the coarse-particle stimulated nucleation (PSN) and pinning of the grain boundaries by fine precipitates. The fine DRXed grains, high density of dislocation in the unDRXed region, and fine dense precipitates gave rise to the improved strength of the as-extruded Mg-Zn-Ca-Ce alloy. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：164 / 171

页数：8

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