Advanced

Stability of grain boundary texture during isothermal grain growth in UO2 considering anisotropic grain boundary properties

Hallberg, Håkan LU and Zhu, Yaochan LU (2015) In Journal of Nuclear Materials 465. p.664-673
Abstract
In the present study, mesoscale simulations of grain growth in UO2 are performed using a 2D level set representation of the polycrystal grain boundary network, employed in a finite element setting. Anisotropic grain boundary properties are considered by evaluating how grain boundary energy and mobility varies with local grain boundary character. This is achieved by considering different formulations of the anisotropy of grain boundary properties, for example in terms of coincidence site lattice (CSL) correspondence. Such modeling approaches allow tracing of the stability of a number of characteristic low-Σ boundaries in the material during grain growth. The present simulations indicate that anisotropic grain boundary properties have... (More)
In the present study, mesoscale simulations of grain growth in UO2 are performed using a 2D level set representation of the polycrystal grain boundary network, employed in a finite element setting. Anisotropic grain boundary properties are considered by evaluating how grain boundary energy and mobility varies with local grain boundary character. This is achieved by considering different formulations of the anisotropy of grain boundary properties, for example in terms of coincidence site lattice (CSL) correspondence. Such modeling approaches allow tracing of the stability of a number of characteristic low-Σ boundaries in the material during grain growth. The present simulations indicate that anisotropic grain boundary properties have negligible influence on the grain growth rate. However, considering the evolution of grain boundary character distribution and the grain size distribution, it is found that neglecting anisotropic boundary properties will strongly bias predictions obtained from numerical simulations. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Coincidence site lattice, Grain boundary energy, Level set, Modeling, Simulation, Grain growth, Uranium dioxide
in
Journal of Nuclear Materials
volume
465
pages
664 - 673
publisher
Elsevier
external identifiers
  • wos:000364890300081
  • scopus:84937597830
ISSN
0022-3115
DOI
10.1016/j.jnucmat.2015.06.052
language
English
LU publication?
yes
id
11616abe-df78-4e45-b0c6-fe1e88831cc5 (old id 7524924)
date added to LUP
2015-08-10 10:15:50
date last changed
2017-11-19 03:21:59
@article{11616abe-df78-4e45-b0c6-fe1e88831cc5,
  abstract     = {In the present study, mesoscale simulations of grain growth in UO2 are performed using a 2D level set representation of the polycrystal grain boundary network, employed in a finite element setting. Anisotropic grain boundary properties are considered by evaluating how grain boundary energy and mobility varies with local grain boundary character. This is achieved by considering different formulations of the anisotropy of grain boundary properties, for example in terms of coincidence site lattice (CSL) correspondence. Such modeling approaches allow tracing of the stability of a number of characteristic low-Σ boundaries in the material during grain growth. The present simulations indicate that anisotropic grain boundary properties have negligible influence on the grain growth rate. However, considering the evolution of grain boundary character distribution and the grain size distribution, it is found that neglecting anisotropic boundary properties will strongly bias predictions obtained from numerical simulations.},
  author       = {Hallberg, Håkan and Zhu, Yaochan},
  issn         = {0022-3115},
  keyword      = {Coincidence site lattice,Grain boundary energy,Level set,Modeling,Simulation,Grain growth,Uranium dioxide},
  language     = {eng},
  pages        = {664--673},
  publisher    = {Elsevier},
  series       = {Journal of Nuclear Materials},
  title        = {Stability of grain boundary texture during isothermal grain growth in UO2 considering anisotropic grain boundary properties},
  url          = {http://dx.doi.org/10.1016/j.jnucmat.2015.06.052},
  volume       = {465},
  year         = {2015},
}