Effect of hydrogen doping on structure and phase composition of sheet semi-products of VT23 titanium alloy

Panin P.V., Lukinа E.A., Alexeev E.B.
UDC
669.295
DOI
10.18577/2307-6046-2018-0-7-49-57
Article PDF (Russian) (762.91 KB)
How to cite
Panin P.V., Lukinа E.A., Alexeev E.B. Effect of hydrogen doping on structure and phase composition of sheet semi-products of VT23 titanium alloy // Proceedings of VIAM. 2018. No. 7. DOI: 10.18577/2307-6046-2018-0-7-49-57. URL: https://test.viam.ru/en/journal/2018/7/6
Keywords
titanium alloy VT23, hydrogen technology, hydrogen doping, hydrogenating annealing, phase composition, structure.
Abstract

The influence of extra hydrogen doping on phase and structural transformations in high-strength VT23 alloy has been studied. The volume ratios of α- and β-phases have been defined for room temperature state in dependence on hydrogen amount and hydrogenating annealing temperature in the range from 650 to 800°C. A quantitative estimation of β-phase content and α-particles dimensions in VT23 alloy have been evaluated with hydrogenation parameters being in focus. It has been shown that the alloy contains approximately 30% (vol.) of β-phase in initial condition. Doping with 0,1% (wt.) of hydrogen results in β-phase volume fraction increase from 50% after hydrogenation at 650°C to 80% after hydrogenation at 800°C. The dimensions of α-particles within the mentioned conditions change from 0,6–1,2 to 1,8–2,2 µm.

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