Philosophical magazine. A/Philosophical magazine. A. Physics of condensed matter. Structure, defects and mechanical properties · 1997 · 38 citations · 13 references
Natural SciencesMaterials SciencePhysicsComputational Materials ScienceCondensed Matter PhysicsSolid State PhysicsDeformation MechanismsDislocation MechanicsDislocation TheoryNanomechanical PropertiesNucleationPlastic DeformationDislocation DynamicsDislocation MotionDislocation NucleationDislocationsPartial DislocationsPlastic Deformation BehaviorQuasicrystalsShear Stress
Abstract By a numerical relaxation scheme we have simulated the plastic deformation of a quasicrystal. Shear stress was applied to a quasiperiodic icosahedral atomic configuration of Lennard-Jones particles, and nucleation of dislocation dipoles was observed which move in a slip plane. We also found climb motion and dissociation of a perfect dislocation into a pair of partials. A plane of phasonic defects is left in the wake of the propagating dislocations.
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