OBRABOTKAMETALLOV Vol. 27 No. 3 2025 180 MATERIAL SCIENCE References 1. Osintsev O.E., Fedorov V.N. Med’ i mednye splavy: otechestvennye i zarubezhnye marki [Copper and copper alloys. domestic and foreign brands]. 2nd ed., rev. Moscow, Innovatsionnoe mashinostroenie Publ., 2016. 360 p. ISBN 978-5-9907638-3-8. 2. Kolubaev E.A., Rubtsov V.E., Chumaevsky A.V., Astafurova E.G. Micro-, Meso- and macrostructural design of bulk metallic and polymetallic mate-rials by wire-feed electron-beam additive manufacturing. Physical Mesomechanics, 2022, vol. 25 (6), pp. 479–491. DOI: 10.1134/S1029959922060017. The infl uence of structural state on the mechanical and tribological properties of Cu-Al-Si-Mn bronze Andrey Filippov а, *, Nikolay Shamarin b, Sergei Tarasov c, Natalya Semenchyuk d Institute of Strenght Physics and Materials Sciences SB RAS, 2/4 per. Academicheskii, Tomsk, 634055, Russian Federation a https://orcid.org/0000-0003-0487-8382, avf@ispms.ru; b https://orcid.org/0000-0002-4649-6465, shnn@ispms.ru; c https://orcid.org/0000-0003-0702-7639, tsy@ispms.ru; d https://orcid.org/0000-0001-6547-7676, natali.t.v@ispms.ru Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2025 vol. 27 no. 3 pp. 166–182 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2025-27.3-166-182 ART I CLE I NFO Article history: Received: 23 June 2025 Revised: 03 July 2025 Accepted: 10 July 2025 Available online: 15 September 2025 Keywords: Additive manufacturing Bronze Microstructure Phase composition Mechanical properties Severe plastic deformation (SPD) Sliding friction Funding This research was funded by Russian Science Foundation project № 24-2900259, https://rscf.ru/project/ 24-2900259/. ABSTRACT Introduction. Electron beam additive manufacturing (EBAM) is a promising method for producing new alloys with unique properties. At the same time, existing problems with obtaining a high-quality structure require a search for a technical solution that ensures grain refi nement and the formation of a more homogeneous microstructure. For strain-hardened copper alloys, severe plastic deformation (SPD) methods are eff ective ways to control their structural state and mechanical properties. Currently, the eff ect of severe plastic deformation on the structure, mechanical, and tribological properties of Cu-Al-Si-Mn bronze, which is promising for industrial application, has not been studied. The aim of this work is to study the relationship between the structural state formed as a result of severe plastic deformation and the mechanical and tribological properties of Cu-Al-Si-Mn bronze samples. The paper studies samples of Cu-Al-Si-Mn bronze, made from bronze (3% Si-1% Mn) wires and commercially pure aluminum using multiwire electron beam additive manufacturing. For targeted changes in structure and properties, the resulting additively manufactured blanks were subjected to severe plastic deformation. Multi-axial forging and rolling were used as SPD methods, aimed at signifi cant grain refi nement and increased strength characteristics. The work uses such research methods as transmission electron microscopy (TEM) for a detailed analysis of the submicron structure after SPD, X-ray diff raction (XRD) to identify the phase composition of the alloy, tensile tests to determine key mechanical properties such as tensile strength, yield strength, and percentage of elongation, microhardness measurements to assess the hardening of samples using Vickers loads, confocal laser scanning microscopy (CLSM) for three-dimensional analysis of the surface topography and studying the morphology of worn surfaces, and dry sliding friction tests to assess the wear resistance of the material and the friction coeffi cient in the absence of lubrication under specifi ed loads and sliding speeds. Results and discussion. Based on the data of transmission electron microscopy, it was found that the use of multiaxial forging and rolling led to signifi cant changes in the structure of the material, as well as its phase composition. Based on the X-ray diff raction analysis, it was revealed that severe plastic deformation contributed to the deformation-induced dissolution of the γ- and β-phases. The results of tensile tests showed that the highest strength is achieved after intense plastic deformation by rolling, after multi-axial forging. SPD by multi-axial forging and subsequent rolling led to an increase in the microhardness of bronze. The results of tribological tests showed that SPD contributes to a decrease in the friction coeffi cient (FC) compared to the material in the printed state. Heat treatment of samples after SPD led to an increase in FC and an increase in fl uctuations in its value. SPD by multiaxial forging and subsequent rolling contributes to a signifi cant increase in the wear resistance of samples under dry sliding friction conditions. Low-temperature annealing after SPD leads to a decrease in the wear resistance of deformed samples. Thus, the use of SPD makes it possible to increase the strength and wear resistance of bronze samples of the Cu-Al-Si-Mn system. For citation: Filippov A.V., Shamarin N.N., Tarasov S.Yu., Semenchyuk N.A. The infl uence of structural state on the mechanical and tribological properties of Cu-Al-Si-Mn bronze. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2025, vol. 27, no. 3, pp. 166–182. DOI: 10.17212/1994-6309-2025-27.3-166-182. (In Russian). ______ * Corresponding author Filippov Andrey V., Ph.D. (Engineering), Head of Laboratory Institute of Strenght Physics and Materials Sciences SB RAS, 2/4 per. Academicheskii, 634055, Tomsk, Russian Federation Tel.: +7 999 178-13-40, e-mail: avf@ispms.ru
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