Mechanics, Southwest Jiaotong University, Chengdu, People$''$s Republic of China'
author:
- 'Jian-Hui Zhai'
- Michael Zaiser
bibliography:
- 'references.bib'
title: 'Properties of dislocation lines in crystals with strong atomic-scale disorder'
---

,Discrete Dislocation Dynamics,Langevin force,Spatial force field ,High Entropy Alloys

Introduction
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Discrete dislocation dynamics (DDD) as a mesoscale method to simulate plastic deformation by considering dislocation motion, reactions, and interactions with other defects has been developed over the past decades to simulate deformation of bulk materials [@Zbib1998_IJMS; @Verdier1998_MSMSE] and micropillars [@Schwarz1999_JAP; @Ghoniem1999_PRB; @Weygand2002_MSMSE]. Most of these simulations consider the evolution of dislocation systems in a deterministic setting, without explicitly accounting for stochastic influences that may be either due to thermal fluctuations (’annealed disorder’) or due to spatially random but temporally constant forces arising from small-scale (e.g. chemical) disorder (’quenched disorder’). Such random effects may be significant in novel materials with a large degree of atomic scale disorder such as HEA. They are the main focus of the present study.

Thermal effects can be considered by incorporating Langevin forces into the equations of motion [@Ronnpagel1993_PSS; @Mohles1996_CMS; @Hiratani2002_JEMT; @Hiratani2003_JNM]. R[ö]{}nnpagel et al. [@Ronnpagel1993_PSS] developed a stochastic model that considers the effects of temperature in a line tension model within Brownian dynamics 