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Monte Carlo Investigation of Cascade Damage Effects in Metals Under Low Temperature Irradiation

Published online by Cambridge University Press:  15 February 2011

A.V. Barashev ,
D.J. Bacon  and
S.I. Golubov
A.V. Barashev
Affiliation:
Materials Science and Engineering, Department of Engineering, The University of Liverpool, Brownlow Hill, Liverpool, L69 3GH, UK, a.barashev@liv.ac.uk
D.J. Bacon
Affiliation:
Materials Science and Engineering, Department of Engineering, The University of Liverpool, Brownlow Hill, Liverpool, L69 3GH, UK
S.I. Golubov
Affiliation:
State Scientific Centre of the Russian Federation “Institute of Physics and Power Engineering”, Bondarenko sq. 1, Obninsk, Kaluga region, 249020, Russia
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Abstract

The Monte Carlo (MC) method is used to study cascade damage effects in damage accumulation in pure metals at temperatures below stage III, when vacancies and their clusters are immobile. The irradiation is modelled by sequential introduction of collections of defects representing the primary damage state of cascades placed randomly in the simulation volume. The cascades generated in molecular dynamics simulations for recoil energies from 2 to 20keV are used. Concentrations of point defects as well as defect cluster densities are monitored as a function of dose up to 0.02dpa. The results are compared with those obtained in the mean-field approximation. Factors responsible for the difference in damage accumulation under homogeneous and cascade irradiation conditions are revealed. The effects of temperature and recoil energy are studied. Problems in MC modelling of one-dimensional diffusion of interstitial clusters connected with the limited volume of the simulation box are revealed.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 540: Symposium N / Microstructural Processes in Irradiated Materials , 1998 , 709
Copyright
Copyright © Materials Research Society 1999

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