Evolution of the structural and phase states of a Ti-6Al-4V alloy in forming submicrocrystalline structure with the use of temporary hydrogenation

G. P. Grabovetskaya, E. N. Melnikova, Yu R. Kolobov, I. P. Chernov, E. V. Naidenkin, N. N. Nikitenkov, I. P. Mishin

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Abstract

The special features of the evolution of the structural and phase states of a Ti-6Al-4V alloy in forming submicrocrystalline structure with the use of temporary hydrogen treatment are studied by electron microscopy and x-ray diffraction analysis. Plastic deformation in the α + β two-phase region at 1023 K is found to initiate a complete β → α transformation in a Ti-6Al-4V-H alloy to form an α phase with lattice parameters different from those of the equilibrium α phase. Isothermal annealing at a dehydrogenation temperature of 873 K gives rise to α + β two-phase submicrocrystalline structure with a grain size of ∼ 0.3 μm. The use of nonequilibrium hydrogen release in the deformed Ti-6Al-4V-H alloy exposed to electron beams is shown to result in one-phase submicrocrystalline structure and grain refining. Possible reasons underlying the phase transformations in the alloy under study are discussed.

Original languageEnglish
Pages (from-to)442-447
Number of pages6
JournalRussian Physics Journal
Volume49
Issue number4
DOIs
Publication statusPublished - 1 Apr 2006

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hydrogenation
refining
hydrogen
dehydrogenation
plastic deformation
phase transformations
lattice parameters
electron microscopy
x ray diffraction
grain size
electron beams
annealing
temperature

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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Evolution of the structural and phase states of a Ti-6Al-4V alloy in forming submicrocrystalline structure with the use of temporary hydrogenation. / Grabovetskaya, G. P.; Melnikova, E. N.; Kolobov, Yu R.; Chernov, I. P.; Naidenkin, E. V.; Nikitenkov, N. N.; Mishin, I. P.

In: Russian Physics Journal, Vol. 49, No. 4, 01.04.2006, p. 442-447.

Research output: Contribution to journalArticle

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