Full Record for Micrograph 444
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- Micrograph no
- 444
- Brief description
- Commercial grade free machining brass - Widmanstätten microstructure
- Keywords
- alloy , brass , copper, metal, Widmanstätten , zinc
- Categories
- Metal or alloy
- System
- Cu-Zn
- Composition
- Cu 60, Zn 40 (wt%) + Pb trace
- Standard codes
- Reaction
- Processing
- Chill cast
- Applications
- Sample preparation
- Ammonium persulphate
- Technique
- Reflected light microscopy
- Length bar
- 200 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 a phase precipitates out of the single b phase during cooling to give a plates in a b matrix. The plates form in order to minimise strain energy.
- Contributor
- Dr R F Cochrane
- Organisation
- Department of Materials, University of Leeds
- Date
- 04/09/02
- Licence for re-use
- Attribution-NonCommercial-ShareAlike 4.0 International
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