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

DoITPoMS Micrograph Library Full Record for Micrograph 294
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Full Record for Micrograph 294

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Micrograph no
294
Brief description
Fe, C 0.75 (wt%) steel, quenched and tempered
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, iron, martensite Link to MATTER Glossary entry for martensite, metal, quenching Link to MATTER Glossary entry for quenching, steel Link to MATTER Glossary entry for steel, tempered
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 0.75 (wt%)
Standard codes
Reaction
Processing
Tempered
Applications
Sample preparation
Nital
Technique
Reflected light microscopy
Length bar
200 μm
Further information
This is an example of a quenched and tempered steel. The steel is initially quenched from the austenite phase field to form hard and brittle martensite. Subsequently the steel is reheated to allow diffusion of the interstitially trapped carbon and hence reduction of the lattice strain. This results in a softer and tougher steel.
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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