Mathematical analysis of the titanium alloy surface profile under various modes of electromechanical treatment
- Authors: Romanenko M.D.1, Zakharov I.N.1, Bagmutov V.P.1, Barinov V.V.1, Nguyen M.T.2
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Affiliations:
- Volgograd State Technical University
- Russian Technological University MIREA
- Issue: Vol 27, No 4 (2025)
- Pages: 80-95
- Section: TECHNOLOGY
- URL: https://journals.rcsi.science/1994-6309/article/view/356664
- DOI: https://doi.org/10.17212/1994-6309-2025-27.4-80-95
- ID: 356664
Cite item
Abstract
Introduction. Currently, many mathematical approaches exist for approximating surface profile curves. Most employ volumetric mathematical expressions to describe surface profile parameters after various types of processing. Purpose of the work is to select a mathematical apparatus that is simple enough from an engineering perspective to approximate the surface profile of VT22 titanium alloy samples after surface plastic deformation (SPD) and various electromechanical processing (EMP) modes, with the possibility of eliminating random technological errors. The paper investigates the effect of EMP modes using alternating and direct current at densities of 100, 300, and 600 A/mm2, considering both the application of force by the deforming tool-electrode (150 N) and its absence (10 N), on the surface geometry of VT22 titanium alloy samples. The electromechanical processing of metal alloys used in this work can significantly change the geometric profile, structure, and operational properties of the surface. Its distinctive feature is the creation of both microdeviations (roughness) and macrodeviations and relief (waviness, “oil pockets”, build-ups from metal surfacing to the repair size) on the surface. Research methods. Profilometric analysis was performed using a PM-7 device, followed by processing of the roughness measurement results using the fast Fourier transform (FFT) on the surface of a cylindrical sample made of VT22 titanium alloy with a diameter of 16 mm after electromechanical rolling with an tool-electrode, previously subjected to semi-finish turning. The error of the model curves of the surface profile was estimated using the Pearson correlation coefficient (R). Results and discussion. The use of high-density direct current helps to obtain a surface with a high relative support length of the profile (98.8%), a low arithmetic mean deviation of the profile (1.9 μm), and an average step of profile irregularities (56 μm). Based on the FFT, the considered modes of electromechanical processing contribute to the formation of profile waviness with different pitch and height. The greatest correlation is observed for modes 2, 4, and 9 (R > 0.7), while the lowest correlation coefficient was noted for EMP with a direct current density of 100 and 300 A/mm2 (modes 5 and 6, R < 0.25).
About the authors
Mikhail D. Romanenko
Volgograd State Technical University
Author for correspondence.
Email: romanenko.mihail2009@yandex.ru
ORCID iD: 0000-0002-4800-7151
SPIN-code: 3290-7190
Scopus Author ID: 57209329802
ResearcherId: GNP-5426-2022
https://www.vstu.ru/university/personalii/romanenko_mikhail_dmitrievich/
Ph.D. (Engineering)
Russian Federation, 400005, Russian Federation, Volgograd, 28 Lenin AvenueIgor N. Zakharov
Volgograd State Technical University
Email: 4zaxap@gmail.com
ORCID iD: 0000-0001-7177-7245
SPIN-code: 8194-3649
Scopus Author ID: 7202049526
ResearcherId: M-8437-2013
https://www.vstu.ru/university/personalii/zakharov_igor_nikolaevich/
D.Sc. (Engineering), Associate Professor
Russian Federation, 400005, Russian Federation, Volgograd, 28 Lenin AvenueVyacheslav P. Bagmutov
Volgograd State Technical University
Email: sopromat@vstu.ru
ORCID iD: 0000-0003-3648-8450
SPIN-code: 1691-2822
Scopus Author ID: 6603555304
D.Sc. (Engineering), Professor
Russian Federation, 400005, Russian Federation, Volgograd, 28 Lenin AvenueVladislav V. Barinov
Volgograd State Technical University
Email: barinov@vstu.ru
ORCID iD: 0000-0001-9400-7366
SPIN-code: 1364-1834
Scopus Author ID: 57216800433
Senior Engineer
Russian Federation, 400005, Russian Federation, Volgograd, 28 Lenin AvenueMinh Tuong Nguyen
Russian Technological University MIREA
Email: nguen_m@mirea.ru
ORCID iD: 0009-0004-7484-7009
SPIN-code: 6194-5190
ResearcherId: MCI-9439-2025
Ph.D. (Engineering)
Russian Federation, 119454, Russian Federation, Moscow, 78 Vernadsky AvenueReferences
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Supplementary files
Note
Funding
The study was carried out with financial support from the Russian Science Foundation (project No. 25-29-20241).

