Metal Science and Heat Treatment

, Volume 9, Issue 2, pp 96–99 | Cite as

Influence of hydrogen on the transformations in titanium alloys

  • B. A. Kolachev
  • D. Ya. Vishnyakov
  • V. S. Lyasotskaya
Titanium and Its Alloys


  1. 1.

    The addition of hydrogen to the alloys lowers the temperature of the transition from the α+β-to the β-region.

  2. 2.

    During isothermal treatment hydrogen basically accelerates the decomposition of the martensitic α′-phase and retards the decomposition of the β-phase.

  3. 3.

    In alloys with a subcritical structure hydrogen increases the quantity of the ω-phase formed on quenching.

  4. 4.

    Acting as a β-stabilizer, hydrogen draws the structure of the subcritical alloy toward the critical structure and increases the quantity of the residual β-phase formed on quenching of the alloy.

  5. 5.

    In alloys of supercritical structure hydrogen reduces the quantity of the ω-phase and lowers the maximum temperature at which it is formed.

  6. 6.

    Aging has the greatest effect on the alloys quenched from the temperature at which the β-phase is near the critical structure.

  7. 7.

    Hydrogen increases the effect of aging on alloys quenched from the α+β-region.

  8. 8.

    Increasing hydrogen concentrations reduce the quenching temperature of α+β-alloys and provide the maximum effect of aging.



Hydrogen Titanium Titanium Alloy Hydrogen Concentration Maximum Effect 
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Literature cited

  1. 1.
    L.P. Luzhnikov, V.M. Novikova, A.P. Mareev, and I.S. Orlova, MiTOM, No. 5 (1965).Google Scholar

Copyright information

© Consultants Bureau 1967

Authors and Affiliations

  • B. A. Kolachev
  • D. Ya. Vishnyakov
  • V. S. Lyasotskaya

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