Effect of pre-recovery on microstructure and properties of rolled Al-12.18Zn-3.31Mg-1.43Cu-0.20Zr-0.04Sr aluminum alloy

被引：11

作者：

Cai, Cheng-bin ^{[1
]}

Xu, Xiao-jing ^{[1
]}

Huang, Jin-dong ^{[1
]}

Ju, Shi-hao ^{[1
]}

Ding, Qing ^{[1
]}

Wang, Cheng-song ^{[1
]}

机构：

[1] Jiangsu Univ, Engn Inst Adv Mfg & Modern Equipment Technol, Zhenjiang 212013, Peoples R China

来源：

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS | 2019年 / 26卷 / 02期

关键词：

ultra-high strength aluminum alloy; pre-recovery; microstructure; mechanical property; corrosion resistance; SEVERE PLASTIC-DEFORMATION; MECHANICAL-PROPERTIES; CORROSION BEHAVIOR; RECRYSTALLIZATION BEHAVIOR; ELECTRICAL-CONDUCTIVITY; COMPOSITES;

D O I：

10.1007/s12613-019-1729-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The independently designed and manufactured ultra-high-strength aluminum alloy Al-12.18Zn-3.31Mg-1.43Cu-0.20Zr-0.04Sr was investigated via scanning electron microscopy observations, X-ray diffraction analysis, hardness tests, electrical conductivity tests, tensile tests, intergranular corrosion tests, and exfoliation corrosion tests. The effect of pre-recovery on the microstructure and mechanical properties of this aluminum alloy was also studied. The results show that the pre-recovery heat treatment releases deformation energy, inhibits recrystallization, and decreases the dislocation density. Although the pre-recovery heat treatment has little effect on the hardness, electrical conductivity, and elongation of this aluminum alloy, it can dramatically improve the alloy's tensile strength (the maximum tensile strength increased from 785.0 MPa to 809.2 MPa). Moreover, the tensile properties of this aluminum alloy have a certain degree of isotropy, and the pre-recovery heat treatment does not affect this property. In addition, the rolled aluminum alloy exhibits good corrosion resistance, but the effect of the pre-recovery heat treatment on the alloy's resistance to intergranular and exfoliation corrosion is negligible.

引用

页码：241 / 250

页数：10

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