Mechanical Spectroscopy Studies of Hydrogen Mobility in Titanium Doped Iron Alloy
S. M. Teus, V. G. Gavriljuk
G. V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
Received: 02.07.2019. Download: PDF
Mobility of hydrogen atoms in the $\beta$-phase of titanium alloys doped with iron is studied by means of mechanical spectroscopy. As shown, the hydrogen dissolution in the $\beta$-phase results in appearance of the Snoek-like relaxation at temperatures about 80 K. The $ab initio$ atomic calculations are used to analyse atomic complexes responsible for the relaxation. The results suggest an affinity of hydrogen atom to iron in titanium and a responsible of $s$–H complexes ($s$—substitutional atom) with the symmetry lower than the cubic one for Snoek-like relaxation. The obtained activation energy of hydrogen migration in the $\beta$-phase assumes that such phase could serve as a pathway of hydrogen to the $\alpha$-phase where the hydride could form.
Key words: titanium, hydrogen, mechanical spectroscopy, first principles calculations, Snoek relaxation, hydrogen embrittlement.
URL: http://mfint.imp.kiev.ua/en/abstract/v41/i10/1291.html
DOI: https://doi.org/10.15407/mfint.41.10.1291
PACS: 61.72.jj, 62.40.+i, 66.30.J-, 68.35.Dv, 71.15.-m, 81.40.Np
Citation: S. M. Teus and V. G. Gavriljuk, Mechanical Spectroscopy Studies of Hydrogen Mobility in Titanium Doped Iron Alloy, Metallofiz. Noveishie Tekhnol., 41, No. 10: 1291—1301 (2019)