DoITPoMS

Full Record for Micrograph 23

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Micrograph no
23
Brief description
Fe, C 1.0 (wt%), hypereutectoid alloy
Keywords
alloy Link to MATTER Glossary entry for alloy, austenite Link to MATTER Glossary entry for austenite, carbon, cementite Link to MATTER Glossary entry for cementite, ferrite Link to MATTER Glossary entry for ferrite, hypereutectoid Link to MATTER Glossary entry for hypereutectoid, iron, metal, pearlite Link to MATTER Glossary entry for pearlite, steel Link to MATTER Glossary entry for steel
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 1.0 (wt%)
Standard codes
Reaction
Processing
Normalised
Applications
Sample preparation
Etched in 3% nital
Technique
Scanning electron microscopy (SEM)
Length bar
50 μm
Further information
This secondary electron SEM image shows the cementite delineating prior austenite grain boundaries with a thin layer. The amount of proeutectoid phase is very low, with the majority of the area being taken by the pearlite eutectoid. Again each pearlite cell has a different orientation with the ferrite phase being selectively etched.
Contributor
Prof T W Clyne
Organisation
Department of Materials Science and Metallurgy, University of Cambridge
Date
25/10/01
Licence for re-use
Attribution-Non-Commercial-Share Alike 2.0 UK: England & Wales
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