Deformation Behaviour of ECAP Cu as Described by a Dislocation-Based Model

  1. Prof. Dr. Michael Zehetbauer4 and
  2. Prof. Ruslan Z. Valiev5
  1. N.A. Enikeev1,
  2. H.S. Kim2,
  3. I.V. Alexandrov3 and
  4. S.I. Hong2

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch4e

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Enikeev, N.A., Kim, H.S., Alexandrov, I.V. and Hong, S.I. (2004) Deformation Behaviour of ECAP Cu as Described by a Dislocation-Based Model, 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.ch4e

Editor Information

  1. 4

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

  2. 5

    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 Mechanics, Ufa Science Centre, RAS, Ufa, Russia

  2. 2

    Chungnam National University, Taejon, South Korea

  3. 3

    Institute for Physics of Advanced Materials, USATU, Ufa, Russia

Publication History

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

ISBN Information

Print ISBN: 9783527306596

Online ISBN: 9783527602469

SEARCH

Keywords:

  • deformation behaviour;
  • equal channel angular pressing (ECAP);
  • ECAP Cu;
  • severe plastic deformation (SPD);
  • bulk nanostructured materials

Summary

Material science community experiences a growing interest to severe plastic deformation (SPD) due to its capability to produce bulk nanostructured materials which exhibit outstanding mechanical and changed physical properties [1]. The properties of SPD nanomaterials are strongly determined by their microstructure parameters, such as small grain size, big fraction of high-angle grain boundaries and high defects density. Meanwhile, the deformation mechanisms leading to structure refinement and high average misorientation angle are still not evident enough. Recent years there have been fulfilled many attempts to set up various models which are dealing with large imposed strains (see, for example [2–6] and others). However, the case of SPD still gives a large amount of unanswered questions. For example, it was recently shown that dislocation density evolution during SPD has a certain peculiarity: with strain increasing it reaches its maximum, then drops down and stabilizes [12–14]. Meanwhile, the dislocation structure is a very important parameter of SPD nanomaterials which strongly affects their properties. So the aim of current research is to modify current approach to be applicable for SPD describing. Namely, let us concentrate on the abovementioned effect of dislocation density evolution, typical precisely for SPD.