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The Effect of Temperature on Defect Production by Displacement Cascades in alpha;-IRON

Published online by Cambridge University Press:  15 February 2011

F. Gao ,
D. J. Bacon ,
P. E. J. Flewitt  and
T. A. Lewis
F. Gao
Affiliation:
Department of Materials Science and Engineering, The University of Liverpool Liverpool L69 3BX, UK
D. J. Bacon
Affiliation:
Department of Materials Science and Engineering, The University of Liverpool Liverpool L69 3BX, UK
P. E. J. Flewitt
Affiliation:
Technology & Central Engineering Division, Magnox Electric plc, Berkeley Gloucestershire GL13 9PB, UK
T. A. Lewis
Affiliation:
Technology & Central Engineering Division, Magnox Electric plc, Berkeley Gloucestershire GL13 9PB, UK
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Abstract

Molecular dynamics (MD) simulations have been used to study the number and arrangement of defects produced by displacement cascades as functions of irradiation temperature, Tirr, in α-iron. The continuum treatment of heat conduction was used to adjust the temperature of the MD boundary atoms throughout the cascade process. This new hybrid model has been applied to cascades of either 2 or 5 keV at 100K, 400K, 600K and 900K. The number of Frenkel pairs decreases by about 20–30% as Tir increases from 100K to 900K, due to the increase in the lifetime of the thermal-spike phase. The same effect also brings about an increase in the proportion of selfinterstitial atoms that form clusters.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 439: Symposium B – Microstructure Evolution During Irradiation , 1996 , 307
Copyright
Copyright © Materials Research Society 1997

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