Journal ArticleDOI
A generalized Peierls-Nabarro model for nonplanar screw dislocation cores
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In this paper, a generalized Peierls-Nabarro model is developed to take into account the nonplanar mode of dissociation for screw dislocations, which can be obtained by a self-consistent numerical scheme.Abstract:
The original Peierls-Nabarro model considers planar dissociation only and is therefore not valid for screw dislocations which have more than one slip plane In this work, a generalized Peierls-Nabarro model is developed to take into account the non-planar mode of dissociation for screw dislocations Solution to the governing integral equation can be obtained by a self-consistent numerical scheme The equilibrium configuration, strain and stress fields, and the energy of the dislocation core can be calculated from this modelread more
Citations
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Time-dependent characteristics of incipient plasticity in nanoindentation of a Ni3Al single crystal
Yu-Lung Chiu,Ahw Ngan +1 more
TL;DR: In this paper, depth-sensing nanoindentation was used to trace the transition from elasticity to plasticity in single crystal Ni3Al and it was found that the incipient plasticity occurs spontaneously on increasing the load over a narrow load range.
Journal ArticleDOI
The Peierls model: Progress and limitations
TL;DR: The Peierls model is based on balance of stresses in 1D and has serious limitations as discussed by the authors, which can be overcome by a treatment as a variational problem on the energy level in 2D.
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Experimental evaluation of the Peierls stresses in a variety of crystals and their relation to the crystal structure
TL;DR: Ohsawa et al. as mentioned in this paper used the line tension model of dislocation to estimate the Peierls-Nabarro (P-N) formula for dislocations of 66 slip systems in 52 crystals.
Journal ArticleDOI
The influence of interface shear strength on the glide dislocation–interface interactions
TL;DR: In this article, the influence of interface shear strength on the interaction of lattice glide dislocations with fcc/bcc interfaces was studied using atomistic modeling, and it was shown that relatively low interfaces with relatively low shear strengths can be strong barriers to slip dislocation due to dislocation core spreading within the interface plane.
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Atomistic modeling of mechanical behavior
TL;DR: In this article, the theory and computation of ideal strength, dislocations activation processes and brittle fracture from the atomic perspective, in close connection with experiments and other levels of modeling, are presented.
References
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Book
Numerical Recipes in C: The Art of Scientific Computing
TL;DR: Numerical Recipes: The Art of Scientific Computing as discussed by the authors is a complete text and reference book on scientific computing with over 100 new routines (now well over 300 in all), plus upgraded versions of many of the original routines, with many new topics presented at the same accessible level.
Book
Theory of Dislocations
John Price Hirth,Jens Lothe +1 more
TL;DR: Dislocations in Isotropic Continua: Effects of Crystal Structure on Dislocations and Dislocation-Point-Defect Interactions at Finite temperatures.
Book
Dislocations in solids
TL;DR: In this article, Bertotti, Ferro, and Mazetti proposed a theory of dislocation drag in covalent crystals and formed a model of the formation and evolution of dislocations during irradiation.