Volume of a dislocation network
arXiv:2203.05282 · doi:10.1103/PhysRevMaterials.6.063601
Abstract
We derive a simple analytical line integral expression for the relaxation volume tensor of an arbitrary interconnected dislocation network. This quantity determines the magnitude of dislocation contribution to the dimensional changes and volumetric swelling of a material, and highlights the fundamental dual role of dislocations as sources of internal strain as well as carriers of plastic deformation. To illustrate applications of the method, we compute the relaxation volume of a stacking fault tetrahedron, a defect commonly occurring in fcc metals; the volume of an unusual tetrahedral configuration formed by the (a/2)<111> and a<001> dislocations in a bcc metal; and estimate the relative contribution of extended dislocations to the volume relaxation of heavily irradiated tungsten.
arXiv comment15 pages, 6 figures
References in corpus (11)
- High energy collision cascades in tungsten: dislocation loops structure and clustering scaling laws
- Dislocation interaction with C in alpha-Fe: a comparison between atomic simulations and elasticity theory
- Point defect modeling in materials: coupling ab initio and elasticity approaches
- Elastic modeling of point-defects and their interaction
- Observation of transient and asymptotic driven structural states of tungsten exposed to irradiation
- Parameter-free quantitative simulation of high dose microstructure and hydrogen retention in ion-irradiated tungsten
- Relaxation volumes of microscopic and mesoscopic irradiation-induced defects in tungsten
- Macroscopic elastic stress and strain produced by irradiation
- Elastic effects on relaxation volume tensor calculations
- Incorporating non-adiabatic effects in Embedded Atom potentials for radiation damage cascade simulations
- Hybrid mean field and real space model for vacancy diffusion-mediated annealing of radiation defects