Observations of the effect of Zn on precipitation processes in an Al-Cu-Mg-Ag base alloy

被引：0

作者：

Sofyan, Bondan T. ^{[1
]}

Raviprasad, K. ^{[1
]}

Ringer, Simon P. ^{[1
]}

机构：

[1] Department of Materials Engineering, Monash University, Clayton, Vic. 3168, Australia

来源：

Materials Science Forum | 2000年 / 331卷

关键词：

Age hardening - Composition effects - Energy dispersive spectroscopy - Hardness - Metallographic microstructure - Phase composition - Phase equilibria - Thermal effects - Transmission electron microscopy - Zinc;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

This work examines the role of Zn additions to an Al-Cu-Mg-Ag alloy, focussing on the effects on hardening and microstructural evolution at 150 and 200°C in the T6 and T7 tempers. A detailed characterisation using analytical transmission electron microscopy in conjunction with hardness measurements showed that θ″ and θ′ predominate at temperatures below the GP zone solvus, whereas the Ω phase forms abundantly during ageing at 200°C. The effect of pre-ageing at room temperature prior to artificial ageing caused a slight increase in the level of hardening of both the Zn free and Zn containing alloys. Energy dispersive X-ray microanalysis of the Ω phase revealed an association of Zn and an increased stability of this phase was linked to this chemical difference.

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