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Trends in Dislocation Core Structures and Mechanical Behavior in B2 Aluminide

Published online by Cambridge University Press:  22 February 2011

C. Vailhe  and
D. Farkas
C. Vailhe
Affiliation:
Department of Materials Science and Engineering, Virginia Polytechnic Institute, Blacksburg, VA 24061
D. Farkas
Affiliation:
Department of Materials Science and Engineering, Virginia Polytechnic Institute, Blacksburg, VA 24061
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Abstract

In an effort to understand the deformation mechanism in high temperature B2 intermetallics, atomistic simulations were carried out for dislocation cores in a series of compounds exhibiting the B2 structure (FeAl, NiAl, CoAl). A comparison was made on the basis of core structures, dislocation splittings and Peierls stress values. The (110) and (112) γ surfaces were computed for these three compounds. The importance of the APB values and the maximum shear faults for explaining the dislocation behavior is discussed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 364: Symposium L – High-Temperature Ordered Intermetallic Alloys–VI , 1994 , 395
Copyright
Copyright © Materials Research Society 1995

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