High temperature mechanical properties and microstructure of die forged Al-5.87Zn-2.07Mg-2.42Cu alloy

被引：5

作者：

Li, Yao ^{[1
]}

Xu, Guo-fu ^{[1
,2
]}

Peng, Xiao-yan ^{[1
]}

Liu, Shi-chao ^{[1
]}

Dou, Yu-hai ^{[3
]}

Liang, Xiao-peng ^{[1
]}

机构：

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

[2] Minist Educ, Key Lab Nonferrous Mat Sci & Engn, Changsha 410083, Peoples R China

[3] Griffith Univ, Ctr Clean Environm & Energy, Gold Coast, Qld 4222, Australia

来源：

TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA | 2020年 / 30卷 / 07期

基金：

中国国家自然科学基金;

关键词：

Al-Zn-Mg-Cu alloy; dynamic recovery; high temperature mechanical properties; microstructure; MG-CU ALLOY; DYNAMIC RECRYSTALLIZATION; STATIC RECRYSTALLIZATION; STRENGTHENING MECHANISMS; ALUMINUM-ALLOY; PRECIPITATION; BEHAVIOR; DEFORMATION; PARAMETERS; KINETICS;

D O I：

10.1016/S1003-6326(20)65337-7

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The high temperature mechanical properties (250 degrees C) and microstructure of a die-forged Al-5.87Zn-2.07Mg-2.42Cu alloy after T6 heat treatment were investigated. High temperature tensile tests show that as the temperature increases from room temperature to 250 degrees C, the ultimate tensile strength of the alloy decreases from 638 to 304 MPa, and the elongation rises from 13.6% to 20.4%. Transmission electron microscopy (TEM) and electron backscattered diffraction (EBSD) were applied for microstructure characterization, which indicates that the increase of tensile temperature can lead to the coarsening of precipitates, drop of dislocation density, and increase of dynamic recovery. After tensile testing at 250 degrees C, a sub-grain structure composed of a high fraction of small-angle grain boundary is formed.

引用

页码：1771 / 1779

页数：9

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