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Low-Temperature Plastic Deformation and Resistivity of Coarse-Grain Pure Aluminum

  • S. E. Demyanov
  • M. L. Petrovskii
  • A. V. Petrov
  • S. P. Zakatov
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 44)

Abstract

A characteristic feature of high-purity aluminum conductors is a high plasticity combined with large crystallites (≥ 1 mm). Low-temperature plastic deformation of these materials produces special features that are characteristic of both single crystals and fine-grain polycrystals. In this study, we investigated deformed polycrystals with different grain sizes and determined that the electrical and plastic properties of coarse-grain specimens are not simply values between those of single and polycrystals. At certain strains over the broad deformation range, large peaks in resistivity occurred that were correlated to large-grain orientation with respect to the deformation axis. Two plastic-deformation mechanisms based on the measured local deformation in the grains are discussed. The first mechanism is based on the assumption that high-density dislocation clusters exist in the near-boundary region; the second, on the possibility of grain rotation on the unstrengthened boundary.

Keywords

Electrical Resistivity Local Deformation Resistivity Peak Dislocation Mechanism Deformation Dependence 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1998

Authors and Affiliations

  • S. E. Demyanov
    • 1
  • M. L. Petrovskii
    • 1
  • A. V. Petrov
    • 1
  • S. P. Zakatov
    • 2
  1. 1.Institute of Physics of Solids and Semiconductors NASMinskBelarus
  2. 2.Laboratory of New Technologies and ProductsMoscowRussia

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