Abstract
Differential scanning calorimetry (DSC) and transmission electron microscopy (TEM) have been used to examine the precipitation process in spray cast Al – Zn – Mg – Cu alloys. The study was carried out on an Al – 5.6Zn – 2.5Mg – 1.6Cu alloy and an Al – 11.5Zn – 2.64Mg – 1.16Cu alloy (wt-%). The effect of zinc on the precipitation process in the alloys was investigated. It was found that additional zinc accelerated the kinetics of formation of the precipitates.
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