Image icon  Fe, C 0.9 (wt%), martensite

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Description: Martensite is a metastable supersaturated solid solution of C in steel. The excess carbon atoms sufficiently strain the matrix to produce a b.c.t (body centred tetragonal) structure. In order to minimise interfacial strain between the parent austenite and the transforming martensite the martensites assume a lath or needle shape.
Keywords: alloy • carbon • iron • martensite • metal • metastable • steel
Categories: Science approaches > Microstructure
Science approaches > Phase transformations
Materials > Metals & alloys > Carbon steels
Testing, analysis & experimentation > Metallography
Scale > Micro
Created by: Prof T W Clyne, Department of Materials Science and Metallurgy, University of Cambridge
DoITPoMS, University of Cambridge
Published by: DoITPoMS, University of Cambridge
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Date created: 25 October 2001
Date added: 21 August 2009
Resource ID: 1091