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

DoITPoMS Micrograph Library Full Record for Micrograph 656
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Full Record for Micrograph 656

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Micrograph no
656
Brief description
Al, commercial purity
Keywords
alloy Link to MATTER Glossary entry for alloy, aluminium Link to MATTER Glossary entry for aluminium, grain refinement Link to MATTER Glossary entry for grain refinement, heterogeneous nucleation, metal
Categories
Metal or alloy
System
Al
Composition
Not specified
Standard codes
Reaction
Processing
Applications
Sample preparation
Barkers reagent: 4ml HBF4 in 200 ml H2O. Electrolytic-pass 20V through sample in electrolyte-oxide layer forms on surface of sample. Look at grain structure under polarised light.
Technique
Reflected light microscopy
Length bar
10 mm
Further information
The effects of grain refinement alloying additions in commercial purity aluminium. The ingot has small additions of titanium and boron. Grain refinement results from heterogeneous nucleation of aluminium grains at the insoluble TiB2 particles.
Contributor
Dr J Marrow
Organisation
Department of Materials Science, University of Manchester and UMIST
Date
07/11/02
Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International