Importance of Disclination in Severe Plastically Deformed Materials

  1. Prof. Dr. Michael Zehetbauer2 and
  2. Prof. Ruslan Z. Valiev3
  1. A. E. Romanov

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch4a

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Romanov, A. E. (2004) Importance of Disclination in Severe Plastically Deformed Materials, 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.ch4a

Editor Information

  1. 2

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

  2. 3

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

Author Information

  1. Ioffe Physico-Technical Institute, St. Petersburg, Russia

Publication History

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

ISBN Information

Print ISBN: 9783527306596

Online ISBN: 9783527602469



  • disclination;
  • severe plastically deformed materials;
  • Volterra rotational and translational dislocations;
  • disclination Frank vector;
  • wedge and twist disclinations;
  • loops;
  • dipoles;
  • defects in small particles


A short overview of recent achievements in disclination approach application to severe plastically deformed materials is given. Necessary definitions and designations: Volterra rotational and translational dislocations, disclination Frank (rotation) vector, wedge and twist disclinations, are introduced and explained. The properties of screened disclamation configurations (loops, dipoles, defects in small particles etc.) with relatively small energies are considered. Disclination models for the processes in the structure of plastically deformed materials are reviewed. i The bands with misorientated crystal lattice in metals and other materials are described as a result of partial wedge disclination dipole motion. The disclination approach is applied to the description of workhardening at large strains and to the analysis of grain boundaries and their junctions in conventional polycrystals and nanocrystals.