Influence of Cu on microstructure and tensile properties of 7XXX series aluminum alloy

被引：74

作者：

Liao, Yu-guo ^{[1
]}

Han, Xiao-qi ^{[1
]}

Zeng, Miao-xia ^{[1
]}

Jin, Man ^{[1
]}

机构：

[1] Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200072, Peoples R China

来源：

MATERIALS & DESIGN | 2015年 / 66卷

关键词：

Al-Zn-Mg-Cu alloys; Copper; Recrystallization; Tensile properties; ZN-MG ALLOY; VOLUME FRACTION; COPPER CONTENT; ATOM-PROBE; CORROSION;

D O I：

10.1016/j.matdes.2014.05.003

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The effect of copper content on tensile properties and microstructure of 7XXX series aluminum alloys at 90% deformation is investigated by tensile test, optical microscopy, scanning electronic microscopy (SEM), X-ray diffraction (XRD) and transmission electron microscopy (TEM). The results show that higher Cu-containing alloy would precipitate more quantity of second-phase particles in rolling process at 420 degrees C, which facilitates the process of recrystallization during solution treatment. With the increase of copper content from 0 to 1.6 wt.%, the density of c' phase and the degree of recrystallization increase, meanwhile the strength and plasticity of Al-Zn-Mg-Cu alloy are improved in T6 heat treatment. In addition, the tensile fracture of Cu-free alloy belongs to quasi-cleavage fracture, while the tensile fracture of Cu-containing alloy is dimple fracture and the number of dimples increases with the increasing of copper content. (C) 2014 Elsevier Ltd. All rights reserved.

引用

页码：581 / 586

页数：6

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