Precipitation in Ai-Cu-Mg-Ag casting alloy

J. A. Taylor, B. A. Parker, I. J. Polmear

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Abstract

Castings made from AI-Cu-Mg-Ag alloys have a high response to hardening in the artificially aged condition. This effect is considered to arise because silver changes the ageing process occurring in the equivalent ternary AI-Cu-Mg alloy and promotes precipitation of thin plates of a monoclinic form of the phase θ(CuAl2) on the (111) matrix planes. Replacing silver with cadmium also causes increased hardening, although the effect is less and arises from a refinement in the size of precipitates formed in the existing ageing process.

Original languageEnglish
Pages (from-to)478-482
Number of pages5
JournalMetal Science
Volume12
Issue number10
DOIs
Publication statusPublished - 1 Jan 1978

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