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Computer Simulation of Displacement Cascade Damage in Metals

Published online by Cambridge University Press:  16 February 2011

F. Gao ,
S.J. Wooding ,
A.F. Calder  and
D.J. Bacon
F. Gao
Affiliation:
Department of Materials Science and Engineering, The University, Liverpool L69 3BX, U.K.
S.J. Wooding
Affiliation:
Department of Materials Science and Engineering, The University, Liverpool L69 3BX, U.K.
A.F. Calder
Affiliation:
Department of Materials Science and Engineering, The University, Liverpool L69 3BX, U.K.
D.J. Bacon
Affiliation:
Department of Materials Science and Engineering, The University, Liverpool L69 3BX, U.K.
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Abstract

MD simulations of displacement cascades in a variety of metals of different crystal structure and an ordered alloy are discussed. Frenkel-pair production at the end of the cascade process is well below the NRT theoretical value in all cases and a new empirical relationship between Frenkel-pair number and damage energy is assessed. In contrast with this, antisite production efficiency in ordered alloys increases with increasing energy, as does the atomic mixing of the different atomic species. The degree of clustering of interstitials in cascades is materialdependent. These results are discussed in relation to the highly disordered zone formed in the thermal spike.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 373: Symposium Y – Microstructure of Irradiated Materials , 1994 , 15
Copyright
Copyright © Materials Research Society 1995

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References

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