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Full Record for Micrograph 608

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Micrograph no
608
Brief description
Channelling contrast TEM image of subgrains of extruded aluminium
Keywords
alloy Link to MATTER Glossary entry for alloy, aluminium Link to MATTER Glossary entry for aluminium, annealing Link to MATTER Glossary entry for annealing, channelling contrast, elongation, extrusion Link to MATTER Glossary entry for extrusion, metal, stringers, subgrains
Categories
Metal or alloy
System
Al
Composition
Commercial purity (99.5%)
Standard codes
Reaction
N/A
Processing
Commercial purity (99.5%) aluminium has been extruded and then annealed for 3 hours at 450 degrees C
Applications
Sample preparation
The sample has been thinned by electropolishing
Technique
Transmission electron microscopy (TEM)
Length bar
600 nm
Further information
Fine subgrains can be resolved on the electropolished specimen due to channelling contrast where the intensity of backscattered electrons relates to the crystallographic planes, giving great sensitivity to orientation. The subgrain boundaries coincide with the stringers of fine oxide particles which have formed parallel to the extrusion direction (horizontal).
Contributor
Prof T W Clyne
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Date
03/10/02
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales