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

DoITPoMS Micrograph Library Micrograph 368 and full record

Micrograph 368 and full record

Link to image file for micrograph 368
Micrograph no
368
Brief description
Blackheart cast iron
Keywords
alloy Link to MATTER Glossary entry for alloy, carbon, iron, metal, white cast iron Link to MATTER Glossary entry for white cast iron
Categories
Metal or alloy
System
Fe-C-X   Link to phase diagram
Composition
Fe, C 2.4, Si 1.1, Mn 1.1 (wt%)
Standard codes
Reaction
Processing
as cast
Applications
Sample preparation
Nital
Technique
Reflected light microscopy
Length bar
400 μm
Further information
Blackheart cast iron is produced by heating white cast iron at 900-950 ºC for many days before cooling slowly. This results in a microstructure containing irregular though equiaxed nodules of graphite in a ferritic matrix. The term "blackheart" comes from the fact that the fracture surface has a grey or black appearance due to the presence of graphite at the surface. The purpose of the heat treatment is to increase the ductility of the cast iron.
Contributor
Dr R F Cochrane
Organisation
Department of Materials, University of Leeds
Date
04/09/02
Licence for re-use
Attribution-NonCommercial-ShareAlike 4.0 International
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