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Mechanisms contributing to the pinning of ordinary dislocations in γ-TiAl

Published online by Cambridge University Press:  21 March 2011

Fabienne Grégori  and
Patrick Veyssière
Fabienne Grégori
Affiliation:
LEM, CNRS-ONERA, BP 72, 92322 Châtillon cedex, France.
Patrick Veyssière
Affiliation:
LEM, CNRS-ONERA, BP 72, 92322 Châtillon cedex, France.
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Abstract

Properties of ordinary dislocations and related debris are investigated in single crystals of γ-TiAl deformed in single slip at 20°C and 400°C. Typical of this temperature range are prismatic loops isolated or belonging to arrays, together with multipoles. The interaction of these with mobile ordinary dislocations generates various configurations including trailing-like hairpins. Certain features are consistent with an extrinsic origin for point pinning.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 646 , 2000 , N7.11.1
Copyright
Copyright © Materials Research Society 2001

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Footnotes

1

LPMTM, Institut Galilée, 99 av. J.B. Clément, 93430 Villetaneuse, France.

References

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