Image icon  Al 95, Cu 5 (wt%), microsegregation - cored dendrites

 
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Description: This sample shows kappa-Al dendrites surrounded by a fine eutectic in which the two phases, kappa and θ (AlCu) cannot be resolved optically. The θ phase is non-equilibrium and is present due to microsegregation during solidification. This occurs at the beginning of solidification when the solid is low in solute creating 'cored' dendrites and leaving a solute-enriched liquid.
Keywords: alloy • aluminium • copper • coring • dendrite • metal • microsegregation
Categories: Science approaches > Microstructure
Materials > Metals & alloys > Aluminium & alloys
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: Prof T W Clyne, Department of Materials Science and Metallurgy, University of Cambridge
DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
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Date created: 25 October 2001
Date added: 21 August 2009
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Resource ID: 1112