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The Properties of Twinning Dislocations in Alpha-Titanium Simulated With A Many-Body Interatomic Potential

Published online by Cambridge University Press:  25 February 2011

David J. Bacon  and
Anna Serra
David J. Bacon
Affiliation:
Department of Materials Science and Engineering, University of Liverpool, P.O. Box 147, Liverpool, L69 3BX, U.K.
Anna Serra
Affiliation:
Departament de Matematica, Aplicada III, Universitat Politecnica de Catalunya, ETSE Camins, Gran Capitan s/n, 08034 Barcelona, Spain
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Abstract

Computer simulation of the atomic structure and movement of twinning dislocations in four twin boundaries in the h.c.p. metal α-Ti is described. These dislocations have the form of steps on the twin boundary, and whereas some have cores which are very widely spread over the interface, others are only an interatomic spacing or so across. These configurations are determined mainly by whether or not atomic shuffles are required to restore the h.c.p. crystal structure when the dislocation is introduced. The mobility of the dislocations is also controlled by the same effect, and is found to correlate well with experiment.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 238: Symposium Cb – Structure and Properties of Interfaces in Materials , 1991 , 73
Copyright
Copyright © Materials Research Society 1992

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References

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