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Russian Physics Journal

, Volume 61, Issue 9, pp 1702–1708 | Cite as

The Influence of Structure and Phase Composition of Titanium Alloy on Superplastic Deformation

  • I. V. Ratochka
  • O. N. Lykova
  • I. P. Mishin
  • E. V. Naydenkin
Article
  • 6 Downloads

The paper presents research into the behavior of high-temperature plastic deformation of titanium alloy Ti–4.74 wt.% Al–5.57 wt.% Mo–5.04 wt.% V alloy (VT22) depending on its structure and phase composition. It is shown that the formation of fine-grain structure in this alloy is not a sufficient condition for realizing superplastic deformation. It is found that the formation of the ultra-fine grain structure in VT22 alloy leads to the temperature decrease down to 823 K at the beginning of plastic deformation. This allows achieving the percent elongation of the alloy specimens over 1300% within the temperature range of 973–1073 K and at a 6.9·10–3 s–1 initial tensile rate. The grain boundary sliding is considered to be the main deformation mechanism.

Keywords

titanium alloy severe plastic deformation ultra-fine grain structure superplastic deformation grain boundary sliding 

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  • I. V. Ratochka
    • 1
  • O. N. Lykova
    • 1
  • I. P. Mishin
    • 1
  • E. V. Naydenkin
    • 1
    • 2
  1. 1.Institute of Strength Physics and Materials Science of the Siberian Branch of the Russian Academy of SciencesTomskRussia
  2. 2.National Research Tomsk Polytechnic UniversityTomskRussia

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