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

DoITPoMS Micrograph Library Full Record for Micrograph 20
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Full Record for Micrograph 20

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Micrograph no
20
Brief description
Fe, C 0.1 (wt%), hypoeutectoid alloy
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, cementite Link to MATTER Glossary entry for cementite, ferrite Link to MATTER Glossary entry for ferrite, hypoeutectoid Link to MATTER Glossary entry for hypoeutectoid, iron, metal, pearlite Link to MATTER Glossary entry for pearlite, proeutectoid steel Link to MATTER Glossary entry for proeutectoid steel, steel Link to MATTER Glossary entry for steel
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 0.1 (wt%)
Standard codes
Reaction
Processing
Normalised
Applications
Sample preparation
Etched in 3% nital
Technique
Scanning electron microscopy (SEM)
Length bar
10 μm
Further information
This SEM image of a pearlite region in the microstructure shown in micrograph no 19 shows that the ferrite phase in the pearlite has been selectively etched compared to the cementite. The cementite phase appears to protrude from the surface. Within such A pearlite region there are several colonies in different orientations, indicating that the pearlite nucleated on grains of the primary ferrite.
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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