Advertisement

Materials Science

, Volume 47, Issue 6, pp 790–798 | Cite as

Laws of the thermodiffusion saturation of titanium alloys from amorphous boron in nitrogen

  • V. M. Fedirko
  • I. M. Pohrelyuk
  • O. V. Sambors’kyi
Article

We have established the laws of formation of the structural-phase state, surface topography, and level of the near-surface strengthening of VT1-0, OT4, and VT6s titanium alloys at their thermodiffusion saturation from amorphous boron in nitrogen atmosphere. We have shown that high-gradient strengthened layers, formed due to contact saturation, especially in the temperature range from 900 to 950°C, exert a negative influence on the mechanical properties (plasticity, fatigue life) of alloys with such coatings.

Keywords

titanium alloys thermodiffusion saturation amorphous boron molecular nitrogen surface strengthening 

References

  1. 1.
    G. V. Samsonov and A. P. Épik, Refractory Coatings [in Russian], Metallurgiya, Moscow (1976).Google Scholar
  2. 2.
    A. O. Prytula, I. M. Pohrelyuk, and V. M. Fedirko, “Interaction between amorphous boron and titanium alloys in a gaseous oxygen-containing medium,” Fiz.-Khim. Mekh. Mater., 42, No. 5, 30–34 (2006); English translation: Mater. Sci., 42, No. 5, 601–606 (2006).Google Scholar
  3. 3.
    A. O. Prytula, I. M. Pohrelyuk, and V. M. Fedirko, “Influence of the degree of oxygen rarefaction in a medium on the interaction of boron carbide with titanium alloys,” Fiz.-Khim. Mekh. Mater., 43, No. 1, 80–84 (2007); English translation: Mater. Sci., 43, No. 1, 85–90 (2007).Google Scholar
  4. 4.
    A. O. Pritula, I. N. Pogrelyuk, and V. N. Fedirko, “Influence of the oxygen component of saturating atmosphere on the process of boronizing of titanium alloys,” Metalloved. Term. Obrab. Met., No. 5(635), 27–32 (2008).Google Scholar
  5. 5.
    I. M. Pohrelyuk, V. M. Fedirko, Z. O. Siryk, and O. V. Sambors’kyi, “Influence of temperature on the level of surface strengthening of titanium alloys at their contact saturation from amorphous boron in vacuum,” Visnyk Ternop. Derzh. Tekhn. Univ., No. 1, 28–33 (2009).Google Scholar
  6. 6.
    I. N. Pogrelyuk, V. N. Fedirko, Kh. B. Vasyliv, et al., “Influence of thermodiffusion saturation from amorphous boron on the microstructure and surface topography of titanium alloys,” Uprochn. Tekhnol. Pokr., No. 12, 40–48 (2010).Google Scholar
  7. 7.
    R. F. Voitovich and Z. I. Golovko, High-Temperature Oxidation of Titanium and Its Alloys [in Russian], Naukova Dumka, Kiev (1984).Google Scholar
  8. 8.
    V. M. Fedirko and I. M. Pohrelyuk, Nitriding of Titanium and Its Alloys [in Ukrainian], Naukova Dumka, Kyiv (1995).Google Scholar
  9. 9.
    G. G. Maksimovich, Micromechanical Tests of Materials [in Russian], Naukova Dumka, Kiev (1972).Google Scholar

Copyright information

© Springer Science+Business Media, Inc. 2012

Authors and Affiliations

  • V. M. Fedirko
    • 1
  • I. M. Pohrelyuk
    • 1
  • O. V. Sambors’kyi
    • 1
  1. 1.Karpenko Physicomechanical InstituteUkrainian National Academy of SciencesLvivUkraine

Personalised recommendations