Early decomposition of supersaturated solid solutions of Al-Zn-Mg casting alloys

被引：20

作者：

Dellah, M. ^{[1
,2
]}

Bournane, M. ^{[2
]}

Ragab, Kh A. ^{[2
,3
]}

Sadaoui, Y. ^{[4
]}

Sirenko, A. F. ^{[5
]}

机构：

[1] Univ Tizi Ouzou, Dept Chim, Tizi Ouzou, Algeria

[2] Univ Quebec Chicoutimi, CURAL, Chicoutimi, PQ G7H 2B1, Canada

[3] Cairo Univ, Fac Engn, Dept Met, Cairo, Egypt

[4] Univ Tizi Ouzou, Dept Phys, Tizi Ouzou, Algeria

[5] Univ Kharkov, Fac Phys, Kharkov, Ukraine

来源：

MATERIALS & DESIGN | 2013年 / 50卷

关键词：

Aluminum alloys; Electrical resistance; Hardness; Phase transformation; Small angle X-ray scattering; Solid solution decomposition; 2-STEP AGING TREATMENT; MICROSTRUCTURAL EVOLUTION; MECHANICAL-PROPERTIES; HEAT-TREATMENTS; CU ALLOY; PRECIPITATION; ZONES;

D O I：

10.1016/j.matdes.2013.02.078

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study aimed at investigating the structural, electrical resistivity and hardness changes of aged Al-Zn-Mg alloys. It was observed that the isothermal annealing in temperature range of 25-200 degrees C leads to the following precipitation sequence: Guinier-Preston zones -> eta'-phase -> eta-phase. The significant increase of electrical resistivity (rho) of the considered alloys was associated with the stage of GP zone decomposition. The formation of the intermediate eta'-phase was accompanied with a decrease of electrical resistivity and an increase of hardness. Non-continuous quenching was found to suppress the eta'-phase formation; while elevated quenching rates led to the formation of uniformly distributed fine precipitates in the alloy bulk. (c) 2013 Elsevier Ltd. All rights reserved.

引用

页码：606 / 612

页数：7

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