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Contribution of Porous Grain Boundaries to the High-Temperature Background of Internal Friction

  • PHYSICAL FOUNDATIONS OF STRENGTH AND PLASTICITY
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Abstract

A two-dimensional inhomogeneous diffusion equation for vacancies is solved to find the vacancy-concentration and normal-stress distributions and the rate of mutual grain displacement in a grain boundary. The activation energy of internal friction is shown to have two or three effective values depending on temperature and the degree of grain-boundary nonequilibrium.

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Authors and Affiliations

  1. Moscow Power Institute (Volzhskii Branch), 404110, Volzhskii, Volgograd oblast, Russia

    V. G. Kul’kov & A. A. Syshchikov

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  1. V. G. Kul’kov
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  2. A. A. Syshchikov
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Correspondence to V. G. Kul’kov.

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Translated by K. Shakhlevich

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Kul’kov, V.G., Syshchikov, A.A. Contribution of Porous Grain Boundaries to the High-Temperature Background of Internal Friction. Russ. Metall. 2020, 277–281 (2020). https://doi.org/10.1134/S0036029520040175

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  • DOI: https://doi.org/10.1134/S0036029520040175

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