Gas Nitriding of the Near-Beta-Titanium Alloy

• Autorzy: Luk’yanenko Alexander G. , Pohrelyuk Iryna M. , Fedirko Viktor M. , Molyar A. G. , Trush Vasyl , Kravchyshyn T. M.

Identyfikatory

DOI

10.24425/amm.2023.142419

• Języki publikacji: EN

Abstrakty

EN

The present research investigates the nitriding kinetics of the near-beta-titanium alloy of Ti-Al-Nb-Fe-Zr-Mo-V system at 750, 800, and 850°C in gaseous nitrogen at 10⁵ Pa for 2, 4, and 8 h. The parabolic coefficient kp of the layer’s growth rate and the nitriding activation energy E are set as the kinetic parameters of the nitrided layer’s growth. The activation energy for the formation of a nitride layer is ~108 kJ/mol. The authors discuss the morphology of the nitride layers as well as their roughness and surface hardness. The study determines the effective diffusion coefficient for the growth of diffusion layers in the temperature range of 750...850°C: D_ef = D₀ × exp (-E/RT), where D₀ = 0.0177 m²/s; E = 215.7 kJ/mol. The friction coefficient of the disk from nearbeta-titanium alloy with a bronze block is lowered by significantly more than 10 times after gas nitriding, and the temperature in the friction zone is reduced by 2.5 times.

Słowa kluczowe

EN

near-beta-titanium alloy; nitriding; kinetics; diffusion; microhardness

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 2
• Strony: 431--438
• Opis fizyczny: Bibliogr. 22 poz., fot., rys., tab., wykr.

Twórcy

autor

Luk’yanenko Alexander G.

• G.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, Ukraine

• https://orcid.org/0000-0001-6642-2300

autor

Pohrelyuk Iryna M.

• G.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, Ukraine

• https://orcid.org/0000-0002-3009-2829

autor

Fedirko Viktor M.

• G.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, Ukraine

• https://orcid.org/0000-0002-4337-1691

autor

Molyar A. G.

• G.V. Kurdyumov Institute for Metal Physics of the NAS of Ukraine, Department of Physics of Strength and Ductility of Inhomogeneous Alloys, 36 Academician Vernadsky Boulevard, 03142 Kyiv, Ukraine

autor

Trush Vasyl

• G.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, Ukraine

• https://orcid.org/0000-0002-2264-3918

autor

Kravchyshyn T. M.

• G.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, Ukraine

Bibliografia

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