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Intrinsic Misfit Dislocations on 120° Interface in TiAl

Published online by Cambridge University Press:  10 February 2011

V. Paidar ,
S. Zghal  and
A. Couret
V. Paidar
Affiliation:
Institute of Physics, Academy of Sciences, Na Slovance 2, 180 40 Praha 8, Czech Republic
S. Zghal
Affiliation:
Centre d'Elaboration de Materiaux et d'Etudes Structurales, CNRS, BP 4347, 31055 Toulouse, France
A. Couret
Affiliation:
Centre d'Elaboration de Materiaux et d'Etudes Structurales, CNRS, BP 4347, 31055 Toulouse, France
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Abstract

The misfit between 120° rotational variants of the lamellar structure in γ-phase TiAl with the ordered L10 lattice is analysed. It is shown that such a misfit on the (111) interface plane, which has a shear character, can be accommodated by one, two or three arrays of interface intrinsic dislocations. One example of interface dislocation structure observed by transmission electron microscopy is presented.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 552: Symposium KK – High-Temperature Ordered Intermetallic Alloys VIII , 1998 , KK3.2.1
Copyright
Copyright © Materials Research Society 1999

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References

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