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Philosophical Magazine A Volume 64, 1991 - Issue 4
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Original Articles

Interaction between lattice dislocations and grain boundaries in f.c.c. and ordered compounds: A computer simulation

B. J. Pestman Department of Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 18, 9747, AG Groningen, The Netherlands
,
J. Th. M. De Hosson Department of Applied Physics, Materials Science Centre, University of Groningen, Nijenborgh 18, 9747, AG Groningen, The Netherlands
,
V. Vitek Department of Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA, 19104, USA
&
F. W. Schapink Laboratory of Metallurgy, Delft University of Technology, Rotterdamseweg 137, 2628, AL Delft, The Netherlands
Pages 951-969 | Received 03 Oct 1990, Accepted 12 Dec 1990, Published online: 13 Sep 2006
 
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Abstract

The interaction of ½<110> screw and 60° dislocations with symmetric [110] tilt boundaries was investigated by atomistic simulations using many-body potentials representing a pure f.c.c. metal and ordered intermetallic compounds. The calculations were performed with and without an applied shear stress. The observations were: absorption into the grain boundary, attraction of a lattice Shockley partial dislocation towards the grain boundary and transmission through the grain boundary under the influence of a shear stress. It was found that the structural unit model may help to predict the interaction mechanism for long period boundaries and that the interaction in ordered compounds shows similarities to the interaction in f.c.c. metals. Some comparisons with experimental observations have been made.

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