Structural Models and Mechanisms for the Formation of High-Energy Nanostructures under Severe Plastic Deformation

  1. Prof. Dr. Michael Zehetbauer3 and
  2. Prof. Ruslan Z. Valiev4
  1. A. N. Tyumentsev1,
  2. A. D. Korotaev2,
  3. Yu. P. Pinzhin1,
  4. I. A. Ditenberg2,
  5. I. Yu. Litovchenko1,
  6. N. S. Surikova2,
  7. S. V. Ovchinnikov1,
  8. N. V. Shevchenko2 and
  9. R. Z. Valiev4

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch6j

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Tyumentsev, A. N., Korotaev, A. D., Pinzhin, Yu. P., Ditenberg, I. A., Litovchenko, I. Yu., Surikova, N. S., Ovchinnikov, S. V., Shevchenko, N. V. and Valiev, R. Z. (2004) Structural Models and Mechanisms for the Formation of High-Energy Nanostructures under Severe Plastic Deformation, in Nanomaterials by Severe Plastic Deformation (eds M. Zehetbauer and R. Z. Valiev), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527602461.ch6j

Editor Information

  1. 3

    Institut für Materialphysik, Universität Wien, Boltzmanngasse 5, 1090 Wien, Austria

  2. 4

    Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marks Str., Ufa, 450 000, Russia

Author Information

  1. 1

    Institute of Strength Physics and Materials Technology, RAS, Tomsk, Russia

  2. 2

    Siberian Physicotechnical Institute, Tomsk, Russia

  3. 4

    Institute of Physics of Advanced Materials, Ufa State Aviation Technical University, 12 K. Marks Str., Ufa, 450 000, Russia

Publication History

  1. Published Online: 28 JAN 2005
  2. Published Print: 25 FEB 2004

ISBN Information

Print ISBN: 9783527306596

Online ISBN: 9783527602469

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Keywords:

  • structural models;
  • mechanisms for the formation of high-energy nanostructures;
  • severe plastic deformation;
  • electron microscopy

Summary

Severe plastic deformation is characterized by the intense strain hardening and low efficiency of dislocation mechanisms of deformation (through a noncorrelated motion of dislocations). For this reason the processes of plastic flow and crystal lattice reorientation, which occur under conditions of the formation of nanostructural states [1–6], are controlled by cooperative deformation mechanisms. The cooperative character of deformation implies, on the one hand, collective behavior of elementary defects ensembles, which are deformation carriers, and, on the other hand, concurrent work of various modes of crystal deformation and reorientation, such as dislocation, disclination, and diffusion modes, mechanical twinning, and phase transformations. This paper briefly summarizes the results of a study of the role played by the mentioned cooperative mechanisms for the fragmentation of a crystal during the formation of nanostructural states in metal alloys (Cu, Ni, Ti, austenitic steels) and intermetallic compounds (Ni3Al, TiNi) under various conditions of severe plastic deformation (SPD).