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Dislocation Structure and Deformation Behavior of Intermetallic Compounds

Published online by Cambridge University Press:  15 February 2011

M. J. Mills ,
G. B. Viswanathan ,
R. Srinivasan ,
M.F. Savage ,
R.D. Noebe  and
M. S. Daw
M. J. Mills
Affiliation:
Dept. of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
G. B. Viswanathan
Affiliation:
Dept. of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
R. Srinivasan
Affiliation:
Dept. of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
M.F. Savage
Affiliation:
Dept. of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
R.D. Noebe
Affiliation:
NASA Glenn Research Center, Cleveland, OH 44135
M. S. Daw
Affiliation:
Motorola Corporation, Austin, TX 78721
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Abstract

The fine structure of dislocations in intermetallic compounds can have a profound influence on their macroscopic mechanical properties. The development of appropriate models of deformation requires consideration of dislocation core structure, possible dissociation or decomposition reactions, overall dislocation morphology and relevant dislocation interactions based on detailed transmission electron microscopy study. This empirical information may be rationalized based on both atomistic and continuum-level dislocation modeling. The specific cases of jogged 1/2<110] ordinary dislocations in γ-TiAl and a<101> superdislocations in NiAl are discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 578: Symposia A/C – Multiscale Phenomena in Materials - Experiments in Modeling , 1999 , 169
Copyright
Copyright © Materials Research Society 2000

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References

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