Dissemination of IT for the Promotion of Materials Science (DoITPoMS)

DoITPoMS Micrograph Library Full Record for Micrograph 51

Full Record for Micrograph 51

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Micrograph no
51
Brief description
Cu 60, Zn 40 (wt%), air cooled - Widmanstätten microstructure
Keywords
alloy Link to MATTER Glossary entry for alloy, brass Link to MATTER Glossary entry for brass, copper, metal, Widmanstätten Link to MATTER Glossary entry for Widmanstätten, zinc
Categories
Metal or alloy
System
Cu-Zn   Link to phase diagram
Composition
Cu 60, Zn 40 (wt%)
Standard codes
Reaction
Processing
Homogenised at 850 °C, air cooled
Applications
Sample preparation
Etched in NH4OH/H2O2
Technique
Reflected light microscopy
Length bar
400 μm
Further information
This sample has been air cooled. The fast cooling rate changes the morphology to a 'basket weave' appearance known as a Widmanstätten microstructure. The α phase precipitates out of the single β phase during cooling to give α plates in a β matrix. The plates form in order to minimise strain energy.
Contributor
Prof T W Clyne
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Date
25/10/01
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
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