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Metal Science and Heat Treatment

, Volume 21, Issue 12, pp 927–931 | Cite as

Microalloying of titanium alloys

  • A. I. Khorev
Titanium and Its Alloys
  • 31 Downloads

Conclusions

  1. 1.

    Microalloying with zirconium, hafnium, and REM improves the mechanical properties of α+β and β alloys due to grain refining, lower concentration of impurities in grain boundaries, and more dispersed and even decomposition of metastable phases during aging, which is associated with the increasingly negative values of the heat of formation of oxides of these elements (the ductility of weldments increases by a factor of 2–5).

     
  2. 2.

    The improvement in the mechanical properties with microalloying is larger in the heat-treated condition (as compared with the annealed) in alloys with a high concentration of impurities and a structure resulting from overheating in the β region or a cast structure (as compared with alloys having an equiaxed fine-grained structure).

     
  3. 3.

    The most effective additions are zirconium and hafnium in quantities of 0.02–0.1% for α+β alloys and 0.5–1.5% for β alloys; REM are most effective in quantities of 0.02–0.05% for α+β and β alloys.

     

Keywords

Oxide Titanium Mechanical Property Zirconium Ductility 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Literature cited

  1. 1.
    M. V. Mal'tsev, Modification of the Structure of Metals and Alloys [in Russian], Metallurgiya, Moscow (1964).Google Scholar
  2. 2.
    H. Goldschmidt, Interstitial Alloys [Russian translation], Mir, Moscow (1974), p. 96.Google Scholar
  3. 3.
    A. S. Bai et al., Oxidation of Titanium and Its Alloys [in Russian], Metallurgiya, Moscow (1970), p. 226.Google Scholar
  4. 4.
    S. P. Gordienko, B. V. Fenochka, and V. V. Fesenko, Rare Earth Metals and Their Refractory Oxides (Handbook) [in Russian], Naukova Dumka, Kiev (1971), p. 164.Google Scholar
  5. 5.
    A. I. Khorev, S. G. Glazunov, and L. G. Mukhina, Tsvetnye Met., No. 7, 86 (1966).Google Scholar
  6. 6.
    A. I. Khorev et al., "Effect of small hafnium and zirconium additions on the structure and mechanical properties of β titanium alloys VT15 and IVT1," in: Titanium Alloys [in Russian], S. G. Glazunov and A. I. Khorev (editors), ONTI VIAM (1972), p. 106.Google Scholar

Copyright information

© Plenum Publishing Corporation 1980

Authors and Affiliations

  • A. I. Khorev

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