Gas Nitriding of the Near-Beta-Titanium Alloy
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 10 5 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...
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| Format: | Article |
| Language: | English |
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Polish Academy of Sciences
2023-06-01
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| Series: | Archives of Metallurgy and Materials |
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| Online Access: | https://journals.pan.pl/Content/127265/PDF/AMM-2023-2-03-Luk'yanenko.pdf |
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| author | A.G. Luk’yanenko I.M. Pohrelyuk V.M. Fedirko A.G. Molyar V.S. Trush T.M. Kravchyshyn |
| author_facet | A.G. Luk’yanenko I.M. Pohrelyuk V.M. Fedirko A.G. Molyar V.S. Trush T.M. Kravchyshyn |
| author_sort | A.G. Luk’yanenko |
| collection | DOAJ |
| description | 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 10 5 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: Def = D0 × exp (– E/RT), where D0 = 0.0177 m 2/s; E = 215.7 kJ/mol. The friction coefficient of the disk from near-beta-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. |
| first_indexed | 2024-03-13T07:06:26Z |
| format | Article |
| id | doaj.art-4b9192da1edd4de0aafe9560c4f7267f |
| institution | Directory Open Access Journal |
| issn | 2300-1909 |
| language | English |
| last_indexed | 2024-03-13T07:06:26Z |
| publishDate | 2023-06-01 |
| publisher | Polish Academy of Sciences |
| record_format | Article |
| series | Archives of Metallurgy and Materials |
| spelling | doaj.art-4b9192da1edd4de0aafe9560c4f7267f2023-06-06T08:16:18ZengPolish Academy of SciencesArchives of Metallurgy and Materials2300-19092023-06-01vol. 68No 2431438https://doi.org/10.24425/amm.2023.142419Gas Nitriding of the Near-Beta-Titanium AlloyA.G. Luk’yanenko0https://orcid.org/0000-0001-6642-2300I.M. Pohrelyuk1https://orcid.org/0000-0002-3009-2829V.M. Fedirko2https://orcid.org/0000-0002-4337-1691A.G. Molyar3V.S. Trush4https://orcid.org/0000-0002-2264-3918T.M. Kravchyshyn5G.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, UkraineG.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, UkraineG.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, UkraineG.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, UkraineG.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, UkraineG.V. Karpenko Physico-Mechanics Institute of the NAS of Ukraine, Department of Material Science Bases of Surface Engineering, 5, Naukova Str., 79060 Lviv, UkraineThe 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 10 5 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: Def = D0 × exp (– E/RT), where D0 = 0.0177 m 2/s; E = 215.7 kJ/mol. The friction coefficient of the disk from near-beta-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.https://journals.pan.pl/Content/127265/PDF/AMM-2023-2-03-Luk'yanenko.pdfnear-beta-titanium alloynitridingkineticsdiffusionmicrohardness |
| spellingShingle | A.G. Luk’yanenko I.M. Pohrelyuk V.M. Fedirko A.G. Molyar V.S. Trush T.M. Kravchyshyn Gas Nitriding of the Near-Beta-Titanium Alloy Archives of Metallurgy and Materials near-beta-titanium alloy nitriding kinetics diffusion microhardness |
| title | Gas Nitriding of the Near-Beta-Titanium Alloy |
| title_full | Gas Nitriding of the Near-Beta-Titanium Alloy |
| title_fullStr | Gas Nitriding of the Near-Beta-Titanium Alloy |
| title_full_unstemmed | Gas Nitriding of the Near-Beta-Titanium Alloy |
| title_short | Gas Nitriding of the Near-Beta-Titanium Alloy |
| title_sort | gas nitriding of the near beta titanium alloy |
| topic | near-beta-titanium alloy nitriding kinetics diffusion microhardness |
| url | https://journals.pan.pl/Content/127265/PDF/AMM-2023-2-03-Luk'yanenko.pdf |
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