Image icon  Fe, Ni 30, C 0.3 (wt%), quenched - martensite plates

 
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Description: 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.
Keywords: alloy • carbon • iron • martensite • metal • metastable • nickel • quenching
Categories: Science approaches > Structure, bonding & defects > Twins
Science approaches > Microstructure
Materials > Metals & alloys > Alloy steels
Materials > Metals & alloys > Nickel & alloys
Processes > Thermal treatments > Quenching
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: DoITPoMS, University of Cambridge
Prof T W Clyne, Department of Materials Science and Metallurgy, University of Cambridge
Published by: DoITPoMS, University of Cambridge
License: This resource is released under the Creative Commons Attribution Non-Commercial Share Alike license (2.0 UK: England & Wales).
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Date created: 25 October 2001
Date added: 21 August 2009
Package:
Resource ID: 1109