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Nonlinear surface processes under nonequilibrium TiNi activation by a pulsed electron beam

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Abstract

Nonlinear processes involved in oxygen diffusion from the adsorption layer into the bulk of an alloy exposed to a low-energy high-current pulsed electron beam are investigated in the framework of a mathematical model accounting for nonequilibrium activation and melting of the irradiated material. An example is a TiNi alloy. The model includes heat, diffusion, and kinetic equations, with initial and boundary conditions corresponding to electron-beam treatment of the alloy. Kinetic parameters are estimated. The time and space distributions of the TiNi temperature and oxygen concentration for a varying maximum pulse power density and pulse duration are calculated. The heating and diffusion depths are determined. The results obtained with and without regard to the activation effect are compared.

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Authors and Affiliations

  1. Tomsk State University, Russia

    A. V. Tyan

  2. Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of Sciences, Russia

    A. G. Knyazeva & S. G. Psakhie

Authors
  1. A. V. Tyan
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  2. A. G. Knyazeva
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  3. S. G. Psakhie
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Correspondence to A. G. Knyazeva.

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Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 3, pp. 8–15, March 2007.

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Tyan, A.V., Knyazeva, A.G. & Psakhie, S.G. Nonlinear surface processes under nonequilibrium TiNi activation by a pulsed electron beam. Russ Phys J 50, 204–212 (2007). https://doi.org/10.1007/s11182-007-0029-0

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  • DOI: https://doi.org/10.1007/s11182-007-0029-0

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