OBRABOTKAMETALLOV Vol. 26 No. 4 2024 215 MATERIAL SCIENCE Structure of Inconel 625 alloy blanks obtained by electric arc surfacing and electron beam surfacing Aleksandr Boltrushevich 1, a, Nikita Martyushev 1, b, *, Victor Kozlov 1, c, Yulia Kuznetsova 2, d 1 National Research Tomsk Polytechnic University, 30 Lenin Avenue, Tomsk, 634050, Russian Federation 2 Admiral Ushakov State Maritime University, 93, Lenin Ave., Novorossiysk, 353924, Russian Federation a https://orcid.org/0000-0001-9971-7850, aeb20@tpu.ru; b https://orcid.org/0000-0003-0620-9561, martjushev@tpu.ru; c https://orcid.org/0000-0001-9351-5713, kozlov-viktor@bk.ru; d https://orcid.org/0000-0002-1388-6125, julx@bk.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. 2024 vol. 26 no. 4 pp. 206–217 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2024-26.4-206-217 ART I CLE I NFO Article history: Received: 13 September 2024 Revised: 05 October 2024 Accepted: 10 October 2024 Available online: 15 December 2024 Keywords: Additive manufacturing Inconel 625 Electric arc surfacing Electron beam surfacing Microstructure Funding This research was supported by TPU development program. Acknowledgements The research was carried out at the equipment of the Engineering Center “Design and Production of High-Tech Equipment” and the shared research facility “Structure, mechanical and physical properties of materials”. ABSTRACT Introduction. Development of the manufacturing industry has led to the emergence of new methods for manufacturing blanks and parts. One of these new promising methods is additive manufacturing and, in particular, electric arc and electron beam surfacing technologies. The use of these technologies in the production of blanks from heat-resistant materials provides a number of signifi cant advantages. The paper presents the results of a study of the microstructure of Inconel 625 specimens obtained using EBAM and WAAM technologies. The purpose of the work is a comparative analysis of the microstructure of Inconel 625 nickel alloy blanks obtained using EBAM and WAAM technologies. Methods and materials. The paper examined specimens obtained using EBAM and WAAM technologies. The specimens were manufactured using equipment developed at Tomsk Polytechnic University. Metallographic studies, scanning electron microscopy were carried out, and the microhardness of the obtained specimens was determined. Results and discussion. Comparison of specimens obtained by two diff erent additive printing technologies EBAM and WAAM showed general patterns of structure formation that appear when using additive technologies. The specimens have a dendritic microstructure and contain zones rich in Ti, Mo and Nb, which is typical for nonequilibrium cooling. Pores are also observed in the specimens. The grains in the specimens have a predominantly elongated shape and are oriented in the direction of heat removal. The length of the grains reaches 1 mm. Diff erences in the specimens are observed in the number of formed inclusions of intermetallic compounds, in the number of formed pores, in the size of the grains. The EBAM technology provides more uniform structure. The diff erence in hardness between EBAM and WAAM is about 3.5 %. At the same time, the speed of specimen production using the WAAM technology is signifi cantly higher. For citation: Boltrushevich A.E., Martyushev N.V., Kozlov V.N., Kuznetsova Yu.S. Structure of Inconel 625 alloy blanks obtained by electric arc surfacing and electron beam surfacing. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science, 2024, vol. 26, no. 4, pp. 206–217. DOI: 10.17212/1994-6309-2024-26.4-206-217. (In Russian). ______ * Corresponding author Martyushev Nikita V., Ph.D. (Engineering), Associate Professor National Research Tomsk Polytechnic University, 30 Lenin Avenue, 634050, Tomsk, Russian Federation Tel.: +7 3822 60-62-85, e-mail: martjushev@tpu.ru References 1. Alvarez L.F., Garcia C., Lopez V. Continuous cooling transformations in martensitic stainless steels. ISIJ International, 1994, vol. 34 (6), pp. 516–521. DOI: 10.2355/isijinternational.34.516. 2. Li C., White R., Fang X., Weaver M., Guo Y. Microstructure evolution characteristics of Inconel 625 alloy from selective laser melting to heat treatment. Materials Science and Engineering: A, 2017, vol. 705, pp. 20–31.
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