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The Effect of Vacancy Concentration on the Migration Rate of the Tilt Boundaries in Nickel: Molecular Dynamics Modeling

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Abstract

The molecular dynamics method was used to study the effect of the vacancy concentration on the migration rate of high-angle tilt grain boundaries with misorientation axes 〈111〉 and 〈100〉 in nickel. It is shown that the dependence of the migration rate of grain boundaries on the vacancy concentration is nonmonotonic and has a maximum at a concentration of vacancies introduced at the initial stage of about 1%. With a further increase in the concentration, especially above 4%, the migration rate of such boundaries decreases as a result of dragging the boundaries by low-mobile vacancy clusters attached to it, which can no longer be sorbed by the boundary, as in the case of relatively small clusters.

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Authors and Affiliations

  1. Polzunov Altai State Technical University, 656038, Barnaul, Russia

    G. M. Poletaev

  2. Altai State University, 656049, Barnaul, Russia

    R. Yu. Rakitin

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  1. G. M. Poletaev
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  2. R. Yu. Rakitin
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Correspondence to G. M. Poletaev.

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Translated by E. Chernokozhin

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Poletaev, G.M., Rakitin, R.Y. The Effect of Vacancy Concentration on the Migration Rate of the Tilt Boundaries in Nickel: Molecular Dynamics Modeling. Tech. Phys. Lett. 47, 399–402 (2021). https://doi.org/10.1134/S1063785021040246

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  • DOI: https://doi.org/10.1134/S1063785021040246

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