Features of Mechanical Behaviour and Structure Evolution of Submicrocrystalline Titanium under Cold Deformation

  1. Prof. Dr. Michael Zehetbauer3 and
  2. Prof. Ruslan Z. Valiev4
  1. S.Yu. Mironov1,
  2. M.M. Myshlyaev2 and
  3. G.A. Salishchev1

Published Online: 28 JAN 2005

DOI: 10.1002/3527602461.ch9g

Nanomaterials by Severe Plastic Deformation

Nanomaterials by Severe Plastic Deformation

How to Cite

Mironov, S.Yu., Myshlyaev, M.M. and Salishchev, G.A. (2004) Features of Mechanical Behaviour and Structure Evolution of Submicrocrystalline Titanium under Cold 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.ch9g

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 Metals Superplasticity Problems, Russian Academy of Sciences, Ufa, Russia

  2. 2

    Baikov Institute of Metallurgy and Materials Science, Russian Academy of Sciences, Moscow, 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:

  • mechanical behaviour;
  • structure evolution;
  • submicrocrystalline titanium;
  • cold deformation;
  • severe plastic deformation (SPD);
  • submicrocrystalline (SMC) grain sizes;
  • grain boundary sliding (GBS);
  • intensive dislocation gliding;
  • grain size effect

Summary

Essential technology progress in the methods of severe plastic deformation (SPD) that was reached at last time let to receive structures with submicrocrystalline (SMC) grain sizes (0.1–1 m) in massive billets. Experimental study of their deformation behaviour showed, that SMC materials possess not ordinary combination of physics-mechanical properties. In one aspect it was noted changes of density, modulus of elasticity, diffusion activity and deviation from Hall–Petch law [1]. These cases (in combination with considerable boundaries extent increasing and their «unequilibrium» state) let authors [2] to assume about qualitative change: together with dislocation gliding in grains interior the activation of grain boundary sliding (GBS) took place, even during cold deformation. At the same time, it was found considerable strength increasing [1], presence of high dislocation density [3] and essential internal stress [1, 4], forming of crystallographic and metallographic texture [3]. All of these facts together evidence of intensive dislocation gliding in grains interior and it can be explained in frame of ordinary conceptions about grain size effect on mechanical behaviour.