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Kinetics of rafting in a single crystal superalloy: effects of residual microsegregation

Abstract:

The kinetics of directional γ' coarsening, known as rafting, are examined in the nickel based single crystal superalloy CMSX-4. Electron microscopy and image analysis are used to characterise heat treated specimens, prestrained in creep to a plastic strain beyond the threshold required to initiate rafting. The kinetics of rafting are found to be sensitive to the presence of microsegregation from casting, incompletely removed by the heat treatment process; thus the dendritic regions raft appre...

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Publication status:
Published

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Publisher copy:
10.1179/174328407X192723

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Institution:
University of Oxford
Department:
Oxford, MPLS, Materials
Journal:
MATERIALS SCIENCE AND TECHNOLOGY
Volume:
23
Issue:
8
Pages:
893-902
Publication date:
2007-08-05
DOI:
EISSN:
1743-2847
ISSN:
0267-0836
URN:
uuid:3fe66e96-7e95-4ef4-9671-9a80fbf71b74
Source identifiers:
369708
Local pid:
pubs:369708
Language:
English
Keywords:

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