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Structural transformations at the initial stages of fragmentation of plastically deformed polycrystals: A computer experiment

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Abstract

Results have been presented for a computer experiment on concurrent micro-, meso-, and macroscopic studies of the evolution of dislocation structure in a large (adjacent to one of the junctions) domain of a grain after its constant-rate macroplastic deformation to an extent that corresponds to the onset of the stage of developed plastic deformation. The type of dislocation-density and dislocation-charge distributions, as well as amounts and degrees of inhomogeneity in local plastic deformation, have been analyzed. The type of dislocation rearrangements at the junctions and fractures of high-angle grain boundaries has been established, which is responsible for the formation of the first dangling dislocation boundaries, which are mesodefects that trigger fragmentation.

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Authors and Affiliations

  1. Mechanical Engineering Research Institute, Russian Academy of Sciences, Nizhny Novgorod, 603024, Russia

    V. V. Rybin, V. N. Perevezentsev & Yu. V. Svirina

  2. Peter the Great St. Petersburg Polytechnic University, St. Petersburg, 195251, Russia

    V. V. Rybin

Authors
  1. V. V. Rybin
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  2. V. N. Perevezentsev
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  3. Yu. V. Svirina
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Correspondence to V. V. Rybin.

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Original Russian Text © V.V. Rybin, V.N. Perevezentsev, Yu.V. Svirina, 2017, published in Zhurnal Tekhnicheskoi Fiziki, 2017, Vol. 87, No. 5, pp. 726–735.

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Rybin, V.V., Perevezentsev, V.N. & Svirina, Y.V. Structural transformations at the initial stages of fragmentation of plastically deformed polycrystals: A computer experiment. Tech. Phys. 62, 745–754 (2017). https://doi.org/10.1134/S1063784217050255

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  • DOI: https://doi.org/10.1134/S1063784217050255

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