Image icon  Al-90 wt% Cu (bronze)

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Description: This is a copper-aluminium bronze containing 10 wt% aluminium. A small amount of iron is often added to act as a grain refiner to improve the mechanical properties. Alloys with more than 8 wt% aluminium solidify as the β phase. Below about 930°C, Widmanstätten α phase precipitates. At the eutectoid temperature (565°C) the remaining β decomposes to a lamellar eutectoid of α and β. Rapid cooling from the high temperature β phase can form martensite instead of Widmanstätten α. Aluminium bronzes have high strength, corrosion resistance and good high temperature properties (up to 300-400°C). Typical applications include bearings, gears and corrosion resistant vessels.
Keywords: alloy • aluminium • bronze • copper • corrosion resistance • lamella • martensite • metal • Widmanstä • tten
Categories: Science approaches > Microstructure
Materials > Metals & alloys > Copper & alloys
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: DoITPoMS, University of Cambridge
Dr J Marrow, Department of Materials Science, University of Manchester and UMIST
Published by: DoITPoMS, University of Cambridge
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Date created: 07 November 2002
Date added: 21 August 2009
Resource ID: 1695