Evolution of the Structural-Phase State of a Titanium Alloy of the System Ti–Al–V–Mo During Formation of an Ultrafine-Grained Structure Using Reversible Hydrogenaтion

G. P. Grabovetskaya, O. V. Zabudchenko, I. P. Mishin, E. N. Stepanova, I. V. Ratochka, O. N. Lykova

Research output: Contribution to journalArticle

Abstract

Using methods of electron-microscopy and x-ray structural analysis, we have investigated peculiarities of the evolution of the structural-phase state of an alloy of the system Ti–Al–V–Мо during formation of an ultrafine-grained structure by a method combining hot plastic deformation and reversible hydrogenation. It has been shown that the presence in solid solution of 0.15 wt% hydrogen makes it possible to lower by more than a factor of 2 the magnitude of the plastic deformation needed to obtain an ultrafine-grained state in the alloy. We found that during deformation and subsequent degassing of hydrogen from the alloy, such processes as the phase transformations α′′→β→α and β→α′′ and a redistribution of the doping elements take place, facilitating the formation of a lamellar morphology in the grains and preservation of a high level of strength properties of the ultrafine-grained structure.

Original languageEnglish
Pages (from-to)1330-1337
Number of pages8
JournalRussian Physics Journal
Volume62
Issue number8
DOIs
Publication statusPublished - 1 Dec 2019

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titanium alloys
plastic deformation
degassing
hydrogen
structural analysis
hydrogenation
phase transformations
electron microscopy
solid solutions
x rays

Keywords

  • hydrogen
  • phase transformation
  • titanium alloy
  • ultrafine-grained structure

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Evolution of the Structural-Phase State of a Titanium Alloy of the System Ti–Al–V–Mo During Formation of an Ultrafine-Grained Structure Using Reversible Hydrogenaтion. / Grabovetskaya, G. P.; Zabudchenko, O. V.; Mishin, I. P.; Stepanova, E. N.; Ratochka, I. V.; Lykova, O. N.

In: Russian Physics Journal, Vol. 62, No. 8, 01.12.2019, p. 1330-1337.

Research output: Contribution to journalArticle

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abstract = "Using methods of electron-microscopy and x-ray structural analysis, we have investigated peculiarities of the evolution of the structural-phase state of an alloy of the system Ti–Al–V–Мо during formation of an ultrafine-grained structure by a method combining hot plastic deformation and reversible hydrogenation. It has been shown that the presence in solid solution of 0.15 wt{\%} hydrogen makes it possible to lower by more than a factor of 2 the magnitude of the plastic deformation needed to obtain an ultrafine-grained state in the alloy. We found that during deformation and subsequent degassing of hydrogen from the alloy, such processes as the phase transformations α′′→β→α and β→α′′ and a redistribution of the doping elements take place, facilitating the formation of a lamellar morphology in the grains and preservation of a high level of strength properties of the ultrafine-grained structure.",
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AU - Grabovetskaya, G. P.

AU - Zabudchenko, O. V.

AU - Mishin, I. P.

AU - Stepanova, E. N.

AU - Ratochka, I. V.

AU - Lykova, O. N.

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