Improved mechanical properties of Mg-9Al-1Zn alloy by the combination of aging, cold-rolling and electropulsing treatment

被引：45

作者：

Jiang, Yanbin ^{[1
]}

Guan, Lei ^{[2
]}

Tang, Guoyi ^{[3
]}

Zhang, Zhihao ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Key Lab Adv Mat Proc, Minist Educ, Beijing 100083, Peoples R China

[2] AVIC Beijing Inst Aeronaut Mat, Beijing 100095, Peoples R China

[3] Tsinghua Univ, Grad Sch Shenzhen, Adv Mat Inst, Shenzhen 518055, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2015年 / 626卷

基金：

中国国家自然科学基金;

关键词：

Magnesium alloy; Electropulsing treatment; Recrystallization; Mechanical properties; SEVERE PLASTIC-DEFORMATION; MAGNESIUM ALLOY; RECRYSTALLIZATION; BEHAVIOR;

D O I：

10.1016/j.jallcom.2014.11.154

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The combination of carefully designed aging, cold-rolling and electropulsing treatment (EPT) was proposed to improve the strength and ductility of AZ91 alloy strip. Prior to cold-rolling, the extruded strip was aged in order to precipitate dispersed beta-Mg17Al12 particles in the alpha-Mg matrix for improving the strength of the alloy. When EPT was applied to the cold-rolled strips, EPT rapidly completed the recrystallization of alpha-Mg matrix within several seconds at relatively low temperature of 508-553 K, and the pre-existed beta-Mg17Al12 particles effectively impeded the alpha-Mg grain growth. The microstructure consisting of fine recrystallized grains and dispersed beta-Mg17Al12 particles was obtained. The ultimate tensile strength, yield strength and elongation to failure of the EPT-samples were 362-370 MPa, 270 MPa and 27.6-28.4%, which were improved by 11-12%, 10% and 70-75%, respectively compared with those of the original extruded-strip. The mechanism of EPT improved the mechanical properties of the AZ91 alloy is discussed. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：297 / 303

页数：7

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