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Quasiviscous mass transfer in the high-temperature creep of polycrystals

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Abstract

For the example of lead-based alloys, the nature of the grain-surface distortion and its contribution to the deformation in the high-temperature creep of polycrystals is investigated. It is shown that quasiviscous flow associated with nondiffusional motion of atoms in conditions of a strongly excited state of the crystal makes a definite contribution to the distortion of the initially plane grain surface. The development of this deformation mechanism is facilitated by a high test temperature, motion of the grain as a whole in the deforming polycrystal, and the presence of boundary-seeking impurities with strongly different atomic volumes in the alloy in comparison with the base metal.

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Additional information

Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 12, pp. 47–52, December, 1988.

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Novoselova, E.M., Elsukova, T.F., Olemskoi, A.I. et al. Quasiviscous mass transfer in the high-temperature creep of polycrystals. Soviet Physics Journal 31, 992–996 (1988). https://doi.org/10.1007/BF01101169

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Keywords

  • Mass Transfer
  • Excited State
  • Base Metal
  • Test Temperature
  • Deformation Mechanism