DoITPoMS

Full Record for Micrograph 250

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Micrograph no
250
Brief description
Fe, C 1.3 (wt%) steel, annealed at 1000°C
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, hypereutectoid Link to MATTER Glossary entry for hypereutectoid, iron, metal, normalising Link to MATTER Glossary entry for normalising, steel Link to MATTER Glossary entry for steel
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 1.3 (wt%)
Standard codes
Reaction
Processing
Normalised 1000°C
Applications
Sample preparation
Nital
Technique
Reflected light microscopy
Length bar
100 μm
Further information
An example of a hypereutectoid steel (one that has a carbon composition above that of the eutectic). Upon cooling from the austenite field, the first phase to form is cementite on the austenite grain boundaries. This partitions iron and at the eutectic composition pearlite is formed from the remaining enriched austenite.
Contributor
Dr R F Cochrane
Organisation
Department of Materials, University of Leeds
Date
04/09/02
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
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