Influence of electropulsing treatment on microstructure and mechanical properties of cold-rolled Mg-9Al-1Zn alloy strip

被引：60
作者：
Jiang, Yanbin [1 ,2 ]
Guan, Lei [3 ]
Tang, Guoyi [4 ]
Shek, Chanhung [5 ]
Zhang, Zhihao [1 ,2 ]
机构：
[1] Univ Sci & Technol Beijing, Key Lab Adv Mat Proc MOE, Beijing 100083, Peoples R China
[2] Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 100083, Peoples R China
[3] Inst Aeronaut Mat, Lab Struct Steel Funct Mat & Heat Treatment Proc, Beijing 100095, Peoples R China
[4] Tsinghua Univ, Adv Mat Inst, Grad Sch Shenzhen, Shenzhen 518055, Peoples R China
[5] City Univ Hong Kong, Dept Phys & Mat Sci, Kowloon Tong, Hong Kong, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2011年 / 528卷 / 16-17期
基金：
中国国家自然科学基金;
关键词：
Magnesium alloy; Electropulsing treatment; Recrystallization; Mechanical properties; ELECTRIC-CURRENT PULSES; ULTRAFINE-GRAINED MICROSTRUCTURE; AZ31 MAGNESIUM ALLOY; TEXTURE EVOLUTION; CURRENT-DENSITY; MG ALLOY; PHASE; RECRYSTALLIZATION; SLIP; DEFORMATION;
D O I：
10.1016/j.msea.2011.03.095
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Influences of electropulsing treatment (EFT) on microstructure and mechanical properties of cold-rolled Mg-9Al-1Zn alloy strip were studied. EPT was found to accelerate the recrystallization of cold-rolled Mg-9Al-1Zn alloy strip at a relatively low temperature, and obtain fine microstructure of quasi-single-phase-recrystallized grains. The EPT-induced microstructural changes weakened the intensity of the basal fiber texture, and increased elongation to failure remarkably with a decrease in tensile strength. Fracture surface analysis showed that transition from intergranular brittle facture to transgranular dimple fracture took place with an increase in frequency of EPT. The rapid recrystallization behaviour of the Mg-9Al-1Zn alloy strip under EPT was attributed to the enhancement of nucleation rate and atomic diffusion resulting from the coupling of the thermal and athermal effects. It is supposed that EFT can provide a highly efficient method for the intermediate-softening annealing of magnesium alloys sheet/strips. (C) 2011 Elsevier B.V. All rights reserved.
引用
收藏
页码：5627 / 5635
页数：9
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