A 3D phase field dislocation dynamics model for body-centered cubic crystals

Abstract

In this work, we present a 3D Phase Field Dislocation Dynamics (PFDD) model for body-centered cubic (BCC) metals. The model formulation is extended to account for the dependence of the Peierls barrier on the line-character of the dislocation. Simulations of the expansion of a dislocation loop belonging to the $\left\{110\right\}⟨111⟩$ slip system are presented with direct comparison to Molecular Statics (MS) simulations. The extended PFDD model is able to capture the salient features of dislocation loop expansion predicted by MS simulations. The model is also applied to simulate the motion of a straight screw dislocation through kink-pair motion.

References in corpus (3)

• Probing the ultimate limits of metal plasticity
• An Exactly Solvable Phase-Field Theory of Dislocation Dynamics, Strain Hardening and Hysteresis in Ductile Single Crystals
• A 3D phase field dislocation dynamics model for body-centered cubic crystals

Cited by in corpus (7)

• Multi-scale Investigation of Chemical Short-Range Order and Dislocation Glide in the MoNbTi and TaNbTi Refractory Multi-Principal Element Alloys
• Thermodynamic theory of crystal plasticity: formulation and application to polycrystal fcc copper
• A 3D phase field dislocation dynamics model for body-centered cubic crystals
• Phase-Field Modeling and Peridynamics for Defect Dynamics, and an Augmented Phase-Field Model with Viscous Stresses
• Effective Response of Heterogeneous Materials using the Recursive Projection Method
• Dislocation Patterning as a Mechanism for Flat Band Formation
• Predicting electrical conductivity in Cu/Nb composites: a combined model-experiment study