Image icon  Forging steel, brittle, intergranular fracture

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Description: This steel has been given a welding type stress relief heat treatment which has resulted in the embrittlement of prior austenite grain boundaries due to the segregation of impurities to the boundaries (like P and Sn). The fracture path is now intergranular following the weakened grain boundaries. A similar fracture mechanism is observed with glassy phases and intergranular porosity in ceramics.
Keywords: alloy • brittle • carbon • fracture • intergranular • iron • metal • steel
Categories: Science approaches > Structure, bonding & defects > Grain boundaries
Science approaches > Deformation & failure > Fracture
Science approaches > Microstructure
Processes > Thermal treatments
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
Resource ID: 1145