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Micrograph 252 and full record

Link to image file for micrograph 252
Micrograph no
252
Brief description
Fe, C 0.8 (wt%) steel, eutectoid transformation, normalised at 900ºC
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, eutectoid reaction Link to MATTER Glossary entry for eutectoid reaction, iron, metal, steel Link to MATTER Glossary entry for steel
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 0.8 (wt%)
Standard codes
Reaction
Processing
Normalised 900 ºC
Applications
Sample preparation
Nital
Technique
Reflected light microscopy
Length bar
100 μm
Further information
This steel is of the eutectoid composition. Once the temperature is lowered below the eutectoid temperature the steel becomes simultaneously supersaturated with both ferrite and cementite. A eutectoid transformation results (g to a + Fe3C). The resultant microstructure, known as pearlite, comprises lamellae of cementite (dark) embedded in ferrite (white). The platelets are parallel to each other and do not follow a specific crystallographic direction.
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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