Image icon  Al-4 wt% Cu, over aged alloy

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Description: Prolonged heat treatment above 150°C to 200°C has led to the evolution of the stable CuAl2 phase (θ). The CuAl2 phase is visible at high magnifications. It does not contribute to the strength of the alloy and the over aged aluminium has poor mechanical properties.
Keywords: aged • alloy • aluminium • copper • hardening • heat treatment • metal • quenching • vacancy
Categories: Science approaches > Microstructure
Materials > Metals & alloys > Aluminium & alloys
Materials > Metals & alloys > Copper & alloys
Processes > Thermal treatments > Ageing
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: Dr J Marrow, Department of Materials Science, University of Manchester and UMIST
DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
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Date created: 07 November 2002
Date added: 21 August 2009
Resource ID: 1687