Influence of the Ti:Al:Cr Proportion on the Structure and Oxidation Resistance of Ternary Intermetallic Coatings POroduced by non-Vacuum Electron Beam Cladding | Sciact - CRIS-system of Boreskov Institute of Catalysis

Influence of the Ti:Al:Cr Proportion on the Structure and Oxidation Resistance of Ternary Intermetallic Coatings POroduced by non-Vacuum Electron Beam Cladding Full article

Journal

Intermetallics
ISSN: 0966-9795 , E-ISSN: 1879-0216

Output data

Year: 2025, Volume: 181, Article number : 108745, Pages count : 15 DOI: 10.1016/j.intermet.2025.108745

Tags

Titanium aluminides; Intermetallic coatings; CALPHAD; Oxidation; Phase composition

Authors

Lazurenko D.V. ^1,2 , Ruktuev A.A. ¹ , Malyutina Yu.N. ¹ , Dovzhenko G.D. ³ , Song L. ⁴ , Aleksandrova N.S. ¹ , Lozhkina E.A. ¹ , Domarov E.V. ⁵ , Ukhina A.V. ⁶

Affiliations

1	Novosibirsk State Technical University, Karl Marks av. 20, 630073, Novosibirsk, Russia
2	Synchrotron Radiation Facility - Siberian Circular Photon Source «SKIF», Boreskov Institute of Catalysis SB RAS, 630559, Kol’tsovo, Russia
3	Boreskov Institute of Catalysis SB RAS, 5 Acad. Lavrentiev Pr., Novosibirsk, 630090, Russia
4	Northwestern Polytechnical University, 127, West YouYi Road, 710072, Xi’an, China
5	Budker Institute of Nuclear Physics SB RAS, Lavrentyeva str. 11, 630090, Novosibirsk, Russia
6	Institute of Solid State Chemistry and Mechanochemistry SB RAS, Kutateladze 18, 630128, Novosibirsk, Russia

Funding (1)

Ministry of Science and Higher Education of the Russian Federation

075-15-2022-263

Titanium is known to be a material with poor oxidation resistance. When heated, it reacts with atmospheric gases, leading to the formation of the TiO2 oxide film on its surface. This film does not protect the material against further oxidation. To solve this problem, heat-resistant coatings, including TiAl-based ones, are applied to titanium. This study investigates ternary Ti-Al-Cr surface layers with different concentrations of components. The protective layers were fabricated on titanium substrates by non-vacuum electron beam cladding. This method provides the formation of thick coatings (up to 2 mm in a single pass of the electron beam); however, the structure of the cladding layers can be significantly inhomogeneous. To reveal the influence of microstructural features of the coatings and the uneven elemental distribution on their oxidation behavior, detailed structural studies combined with the CALPHAD method were performed both before and after oxidation testing. It was found that an Al-rich alloy consisting primarily of the γ-phase provided the best protection against oxidation. The introduction of high concentrations of both Al and Cr yielded contradictory results. Although the L12-and C14-phases formed in the coating are predicted to contribute to the development of a protective Al2O3 film, the oxidation resistance of this cladding layer was comparable to that of titanium. This result can be attributed to the inhomogeneity of the coating and the appearance of the B2-phase in local areas of the coating at oxidation temperature and the decomposition of the Cr-depleted C14-phase. Furthermore, the Cr-rich B2-phase provides better oxidation resistance than the α2-phase of Al-lean cladding layers.

Lazurenko D.V. , Ruktuev A.A. , Malyutina Y.N. , Dovzhenko G.D. , Song L. , Aleksandrova N.S. , Lozhkina E.A. , Domarov E.V. , Ukhina A.V.
Influence of the Ti:Al:Cr Proportion on the Structure and Oxidation Resistance of Ternary Intermetallic Coatings POroduced by non-Vacuum Electron Beam Cladding
Intermetallics. 2025. V.181. 108745 :1-15. DOI: 10.1016/j.intermet.2025.108745 WOS Scopus РИНЦ OpenAlex publication_identifier_short.sciact_skif_identifier_type

Submitted:	Dec 17, 2024
Accepted:	Mar 11, 2025
Published online:	Mar 15, 2025
Published print:	Jun 1, 2025

Web of science:	WOS:001448286100001
Scopus:	2-s2.0-86000791084
Elibrary:	80603219
OpenAlex:	W4408489714
publication_identifier.sciact_skif_identifier_type:	3797

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