Effects of hot ring rolling and aging treatment on microstructure and mechanical properties of AZ80-Ag alloy

被引：31

作者：

Zeng, Gang ^{[1
]}

Yu, Shilun ^{[1
]}

Gao, Yonghao ^{[1
]}

Liu, Chuming ^{[1
]}

Han, Xiuzhu ^{[2
]}

机构：

[1] Cent S Univ, Sch Mat Sci & Engn, Changsha 410083, Hunan, Peoples R China

[2] Aerosp Res Inst Mat & Proc Technol, Beijing 100076, Peoples R China

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2015年 / 645卷

基金：

中国国家自然科学基金;

关键词：

AZ80-Ag; Hot ring rolling; Microstructure; Texture; Mechanical anisotropy; DYNAMIC RECRYSTALLIZATION; PLASTIC-DEFORMATION; MG; MAGNESIUM; TEXTURE; TEMPERATURE; AG; EVOLUTION; BEHAVIOR; ZN;

D O I：

10.1016/j.msea.2015.08.032

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

For the first time, a large sized AZ80-Ag alloy ring was successfully manufactured by hot ring rolling (HRR) at 673 K. The effects of the HRR process and aging treatment on microstructure, texture and mechanical properties were systematically investigated. The microstructure is mainly composed of the equiaxed grains, suggesting the occurrence of dynamic recrystallization. After aging at 448 K for 36 h, considerable discontinuous fl-MgvAliz precipitates with a small number of continuous beta-Mg17Al12 phase. Ag is mainly segregated in the beta-Mg17Al12 precipitates. The yield strength along the axial direction is higher than that along the rolling direction, indicating obvious mechanical anisotropy due to the inclination of {0002} basal pole towards the rolling direction. After aging treatment, the yield strength and ultimate tensile strength are enhanced owing to the precipitation of beta-Mg17Al12 phase. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：273 / 279

页数：7

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