Correlation between Electrical Resistivity, Particle Dissolution, Precipitation of Dispersoids, and Recrystallization Behavior of AA7020 Aluminum Alloy

被引：98

作者：

Eivani, A. R. ^{[1
]}

Ahmed, H. ^{[1
]}

Zhou, J. ^{[2
]}

Duszczyk, J. ^{[2
]}

机构：

[1] Mat Innovat Inst, NL-2628 CD Delft, Netherlands

[2] Delft Univ Technol, Dept Mat Sci & Engn, NL-2628 CD Delft, Netherlands

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE | 2009年 / 40A卷 / 10期

关键词：

MG-CU ALLOY; EVOLUTION; ZIRCONIUM; SC; PREPRECIPITATION; HOMOGENIZATION; PHASES;

D O I：

10.1007/s11661-009-9917-y

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This research concerns the effect of homogenization treatment on the electrical resistivity of AA7020 aluminum alloy variants with different Zr and Cr contents. Small changes in the Zr and Cr contents of the as-cast alloy increase the electrical resistivity significantly. After employing various homogenization treatments, the electrical resistivity decreases, which is due to the depletion of Zr, Cr, and Mn in the matrix, by forming small dispersoids. The optimum treatment proposed in order to obtain the smallest recrystallized grains is to hold the material at 550 A degrees C for 24 hours, which results in the lowest electrical resistivity. The viability of the proposed treatment was tested through hot compression tests and static annealing. Indeed, the samples homogenized at 550 A degrees C for 24 hours showed the smallest recrystallized grains compared to those homogenized at other temperatures.

引用

页码：2435 / 2446

页数：12

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