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Micrograph 45 and full record

Link to image file for micrograph 45
Micrograph no
45
Brief description
Fe, Ni 30, C 0.3 (wt%), quenched - martensite plates
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, iron, martensite Link to MATTER Glossary entry for martensite, metal, metastable Link to MATTER Glossary entry for metastable, nickel, quenching Link to MATTER Glossary entry for quenching
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 0.3, Ni 30 (wt%)
Standard codes
Reaction
Processing
Quenched to -80 °C
Applications
Sample preparation
Technique
Reflected light microscopy
Length bar
200 μm
Further information
This sample was quenched to -80 °C to give a metastable martensitic microstructure. The martensite plates show a lenticular morphology as the material attempts to shear as it transforms but is unable to open up voids at the grain boundaries. The plates form in a similar way to mechanical twins but the shear processes lead to changes in crystal structure as well as crystallographic orientation.
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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