10.14489/td.2026.05.pp.049-059

2026, 05 May

DOI: 10.14489/td.2026.05.pp.049-059

Rastegaev I. A., Akimov E. G., Shafeev M. R., Rastegaeva I. I., Polunin A. V., Merson D. L., Krishtal M. M.
THE RELATIONSHIP BETWEEN THE CHARACTERISTICS OF ACOUSTIC EMISSION IN THE ANODIC AND CATHODIC HALF-PERIODS AND THE TREATMENT MODE UNDER PLASMA-ELECTROLYTIC OXIDATION
(pp. 49-59)

Abstract. This paper is devoted to study of visual and acoustic signs of plasma electrolytic oxidation (PEO) process stages suitable for their in situ identification, as well as the feasibility of their detecting using optical and acoustic emission (AE) methods. The study was performed using experimental data obtained under PEO of a deformable Al-Mg alloy in an alkaline-silicate-phosphate electrolyte under 125 treatment modes, which corresponds to all typical treatment modes of aluminum alloy in terms of current density, cathodic and anodic current ratios in half-periods, and treatment time. It was found that visual signs, and therefore optical methods (the main ones used in present time), identify PEO stages with less accuracy than AE signs. It is shown that the reasons that reduced sensitivity of the optical method do not affect the effectiveness of the AE method. It has been found that the proposed new approach to the AE method, using parallel analysis of the shape and position of AE signals in the anodic and cathodic half-periods of forming pulse, allows for a more substantiated and accurate identification of the stages and time stamps of PEO stages compared to the AE integrated amplitude currently used in the AE method. Using this new approach for simultaneous analysis of AE in the anodic and cathodic half-periods, it has been demonstrated, that a significant reduction in the duration of the anodization and the transition stages is achieved by increasing the current density and its ratio in the anodic and cathodic half-periods of the forming pulse.

Keywords: plasma-electrolytic oxidation, aluminum alloy, acoustic emission, microarc discharges, in situ monitoring.

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I. A. Rastegaev, E. G. Akimov, M. R. Shafeev, I. I. Rastegaeva, A. V. Polunin, D. L. Merson, M. M. Krishtal (Togliatti State University, Togliatti, Russia) E-mail: Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , С Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра. , Данный адрес e-mail защищен от спам-ботов, Вам необходимо включить Javascript для его просмотра.

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