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The Effect of Migration Energies on Reducing Overprediction in Radiation-Induced Segregation Models

  • T. R. Allen (a1) and G. S. Was (a1)

Abstract

Models for calculating radiation-induced segregation (RIS) in concentrated alloys based solely on differences in the magnitude of the vacancy driven flux typically overpredict the amount of grain boundary segregation. A simple sensitivity analysis is used to show that the overprediction may be linked to the choice of input parameters. By varying the Cr-vacancy migration energy from 1.300eV to 1.320 eV and the Fe-vacancy migration energy from1.300eV to 1.305 eV, well within their experimental uncertainty, RIS model calculations are brought into better agreement with AES and STEM-EDS measurements of grain boundary segregation in Fe-Cr-Ni alloys irradiated with protons at 7x 10−6 dpa/s at various temperatures and doses.

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[1] Damcott, D.L., Allen, T.R., and Was, G.S., J. Nucl. Mater., in press.
[2] Simonen, E.P. and Bruemmer, S.M., these proceedings.
[3] Norris, D.I.R., Baker, C., and Titchmarsh, J.M., in Proceedings of the Conference on Materials for Nuclear Reactor Core Applications. Vol. 1 (BNES, London 1987) p. 277.
[4] Marwick, A.D., Piller, R.C., and Horton, M.E., in Dimensional Stability and Mechanical Behavior of Irradiated Metals and Alloys, Vol. 2, Harris, D.R., Ed., (Proceedings of the BNES Conference, Brighton, 11-13 April 1983) BNES, London, 1984, pp. 1115.
[5] Perks, J.M., Marwick, A.D., and English, C.A., in Proceedings of the symposium on radiation- induced sensitization of stainless steels. Berkeley Nuclear Laboratories. 23 September 1986 (CEGB, Berkeley Nuclear Laboratories, Berkeley, Gloucestershire, 1987) pp. 1634.
[6] Rothman, S.J., Nowicki, L.J., and Murch, G.E., J. Phys. F: Metal Phys. 10 383 (1980).
[7] Million, B., Ruzickova, J., and Vrestal, J., Mat. Sci. and Eng. 72 85 (1985).
[8] Carter, R.D., Damcott, D.L., Atzmon, M., and Was, G.S., in Proceedings of the 6th International Symposium on Environmental Degradation of Materials in Nuclear Power Systems-Water 106 Reactors edited by Gold, R.E. and Simonen, E.P. (Warrendale, PA:The Minerals, Metals, and Materials Society, 1993) pp.501510.

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