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Influence of the number of passes under equal-channel angular pressing on the elastic-plastic properties, durability, and defect structure of the Al + 0.2 wt % Sc alloy

  • Defects and Impurity Centers, Dislocations, and Physics of Strength
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Abstract

The regularities of the influence of the number of passes under equal-channel angular pressing on the mechanical properties and defect structure of an aluminum alloy have been elucidated. It has been established that the degradation of the mechanical properties (a decrease in the durability) is associated with the formation of nanoregions of an excess free volume in the course of severe plastic deformation under equalchannel angular pressing. A correlation between the nucleation of excess free volume regions and the formation of high-angle grain boundaries under equal-channel angular pressing has been revealed. The nature of the influence of severe plastic deformation on the elastic modulus, the vibration decrement, and the microplastic flow stress has been analyzed.

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Authors and Affiliations

  1. Ioffe Physical-Technical Institute, Russian Academy of Sciences, Politekhnicheskaya ul. 26, St. Petersburg, 194021, Russia

    V. I. Betekhtin, B. K. Kardashev, A. G. Kadomtsev & M. V. Narykova

  2. Institute of Physics of Materials, Academy of Sciences of the Czech Republic, Zizkova 22, Brno, 61662, Czech Republic

    V. Sklenicka

  3. Mathematical Institute, Academy of Sciences of the Czech Republic, Zitna 25, Prague 1, 11567, Czech Republic

    I. Saxl

Authors
  1. V. I. Betekhtin
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  2. V. Sklenicka
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  3. I. Saxl
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  4. B. K. Kardashev
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  5. A. G. Kadomtsev
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  6. M. V. Narykova
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Correspondence to V. I. Betekhtin.

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Original Russian Text © V.I. Betekhtin, V. Sklenicka, I. Saxl, B.K. Kardashev, A.G. Kadomtsev, M.V. Narykova, 2010, published in Fizika Tverdogo Tela, 2010, Vol. 52, No. 8, pp. 1517–1523.

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Betekhtin, V.I., Sklenicka, V., Saxl, I. et al. Influence of the number of passes under equal-channel angular pressing on the elastic-plastic properties, durability, and defect structure of the Al + 0.2 wt % Sc alloy. Phys. Solid State 52, 1629–1636 (2010). https://doi.org/10.1134/S1063783410080111

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  • DOI: https://doi.org/10.1134/S1063783410080111

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