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Creep of TiAl alloys at 750°C under moderate stress

Published online by Cambridge University Press:  26 February 2011

Alain Couret  and
Joel Malaplate
Alain Couret
Affiliation:
CEMES/CNRS, 29 rue J. Marvig, BP 4347, 31055 Toulouse Cedex 4, France
Joel Malaplate
Affiliation:
CEMES/CNRS, 29 rue J. Marvig, BP 4347, 31055 Toulouse Cedex 4, France
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Abstract

The creep properties at 750°C of TiAl alloys produced by cast and powder metallurgy processes are investigated by creep tests and subsequent TEM investigations. It is demonstrated that the same dislocation mechanism is controlling the primary and secondary creep stages in these two alloys. This mechanism is the mixed climb of ordinary dislocations. Explanations to the creep behaviour during primary and secondary stages are then proposed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 842: Symposium S – Integrative and Interdisciplinary Aspects of Intermetallics , 2004 , S7.8
Copyright
Copyright © Materials Research Society 2005

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References

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