Interaction between lattice dislocations and grain boundaries in f.c.c. and ordered compounds: A computer simulation
Open Access
- 1 October 1991
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine A
- Vol. 64 (4) , 951-969
- https://doi.org/10.1080/01418619108213958
Abstract
The interaction of ½ 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.Keywords
This publication has 21 references indexed in Scilit:
- CSL/DSC Lattice model for general crystalcrystal boundaries and their line defectsPublished by Elsevier ,2003
- Atomic structure of (111) twist grain boundaries in f.c.c metalsPhilosophical Magazine A, 1990
- Mechanism of boron-induced ductility in polycrystalline Ni3AlPhilosophical Magazine Letters, 1990
- Interactions of deformation-induced dislocations with Σ = 9(122) grain boundaries in Si studied by HREMPhilosophical Magazine A, 1988
- Computer simulation of dislocation core structure in Ni3Al using local volume dependent potentialsScripta Metallurgica, 1988
- SimpleN-body potentials for the noble metals and nickelPhilosophical Magazine A, 1987
- In-situ straining of Ni3Al in a transmission electron microscopeActa Metallurgica, 1987
- Grain boundary ordering configurations in the L12 or Ni3Al structureActa Metallurgica, 1987
- Screw dislocation in a model sodium latticePhilosophical Magazine, 1970
- The influence of the difference of orientation of two crystals on the mechanical effect of their boundaryProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1937