The effect of ion-plasma treatment exposure on the phase composition and microstructure of intermetallic surface layers in the Ti-6Al-4V alloy preliminarily coated with aluminum

A.A. Nikolaev, K.N. Ramazanov, A.Yu. Nazarov, V.R. Mukhamadeev, M.Yu. Panchenko, E.G. Astafurova show affiliations and emails
Received: 30 May 2023; Revised: 14 June 2023; Accepted: 16 June 2023
Citation: A.A. Nikolaev, K.N. Ramazanov, A.Yu. Nazarov, V.R. Mukhamadeev, M.Yu. Panchenko, E.G. Astafurova. The effect of ion-plasma treatment exposure on the phase composition and microstructure of intermetallic surface layers in the Ti-6Al-4V alloy preliminarily coated with aluminum. Lett. Mater., 2023, 13(4) 292-297
BibTex   https://doi.org/10.22226/2410-3535-2023-4-292-297

Abstract

The effect of exposure (30, 60, and 120 min) during the processing in the low-pressure non-self-sustained arc discharge plasma on microstructure and phase composition of the modified surface layers obtained in a Ti-6Al-4V alloy with a preliminary deposited Al coating has been evaluated.Using the methods of X-ray diffraction analysis, scanning and transmission electron microscopy, energy dispersive spectroscopy, we study the microstructure and phase composition of the modified surface layers in a Ti-6Al-4V alloy obtained by a deposition of aluminum coating and processing in the low-pressure non-self-sustained arc discharge plasma with different exposure (30, 60, and 120 min). During such complex ion-plasma assisted processing for 30 and 60 minutes, an intermetallic coating (TiAl3) and a modified surface layer (TiAl3 + TiAl + Ti3Al) are formed in the base titanium alloy. An increase in the processing exposure to 120 minutes is accompanied by almost complete spraying of the coating and assists the formation of a higher fraction of the TiAl intermetallic phase in the surface layers of the Ti-6Al-4V alloy.

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Funding

1. Russian Federation represented by the Ministry of Science and Higher Education - 075-15-2021-1348
2. the Government research assignment for ISPMS SB RAS - FWRW-2022-0005