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

DoITPoMS Micrograph Library Full Record for Micrograph 65
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Full Record for Micrograph 65

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Micrograph no
65
Brief description
Fe, C 3.6, Si 2.1, Mg 0.07 (wt%), spheroidal graphite
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, graphite Link to MATTER Glossary entry for graphite, iron, isotropic Link to MATTER Glossary entry for isotropic, magnesium, metal, silicon Link to MATTER Glossary entry for silicon
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 3.6, Si 2.1, Mg 0.07 (wt%)
Standard codes
Reaction
Processing
Applications
Sample preparation
Technique
Reflected light microscopy
Length bar
80 μm
Further information
The addition of a small amount of Mg (0.07 wt%) significantly improves the mechanical properties of cast iron. The Mg poisons the favoured growth directions of the graphite allowing only isotropic growth and producing more equiaxed graphite. The graphite forms spheroidal graphite (black), which does not act as cracks.
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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