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Stability of dislocation short-range reactions in BCC crystals

Article Abstract:

Research was conducted to examine the stability of short-range reactions between two dislocations of parallel line vectors which glide on two parallel slip planes in BCC crystals. The elastic interaction between the two dislocations based on their stress fields at finite speed and the kinetic energy of moving dislocations resulting in inertial forces were two features that were highlighted in DD simulations. Results suggest that the dynamic formation of dislocation dipoles or tilt wall embryos takes place only over a small range of the phase space.

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The interaction between point defects and edge dislocation in BCC iron

Article Abstract:

Research was conducted to examine the interaction of self interstitial atoms and vacancies with edge dislocations in iron crystals using a molecular dynamics study. Calculations reveal that atomistic simulations are very important for obtaining detailed information about the interaction of point defects and dislocations in irradiated materials. Findings also show that the strain field of the self interstitial atoms in BCC iron has shear and dilatational components.

Analysis, Usage, Simulation methods, Simulation, Molecular dynamics, Heavy ions

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Curved parametric segments for the stress field of 3-D dislocation loops

Article Abstract:

Research was conducted to examine a new method for accurate computations of mutual and self interactions between dislocation loops. The approach involved dislocation loops that are segmented with appropriate parametric equations representing the dislocation line vector. Results provide evidence of the efficiency and the potential advantages of the proposed method for calculations of the elastic field of arbitrary-shape, 3-D dislocation loops.

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