Open AccessIsochronal Annealing of Electron-Irradiated Tungsten Modelled by CD Method: 1D and 3DModel of SIA Diffusivity
Author(s) -
М. S. Kondria,
A. Gokhman
Publication year - 2018
Publication title -
fìzika ì hìmìâ tverdogo tìla
Language(s) - English
Resource type - Journals
eISSN - 2309-8589
pISSN - 1729-4428
DOI - 10.15330/pcss.19.1.5-13
Subject(s) - annealing (glass) , thermal diffusivity , tungsten , vacancy defect , materials science , irradiation , microstructure , electron beam processing , molecular physics , crystallography , chemistry , thermodynamics , metallurgy , nuclear physics , physics
The evolution of the microstructure of tungsten under electron irradiation and post-irradiation annealing hasbeen modeled using a multiscale approach based on Cluster Dynamics simulations. In these simulations, bothself-interstitials atoms (SIA) and vacancies, carbon atoms isolated or in clusters, are considered. Isochronal annealing has been simulated in carbon free tungsten and tungsten with carbon, focusing on the recovery stages I and II. The carbon atom, single SIA, single vacancy and vacancy clusters with sizes up to four are treated as the mobile pieces. Their diffusivities as well as the energy formation and binding energies are based on the experimental data and ab initio predictions and some of these parameters have been slightly adjusted, without modifying the interaction character, on isochronal annealing experimental data. The both models with assumption on 1D as well as 3D dimensionality of diffusivity of SIA are treated. The advantage of the model with 1D diffusivity of SIA is found.