Obrabotka Metallov 2020 Vol. 22 No. 2

OBRABOTKAMETALLOV Vol. 22 No. 2 2020 51 MATERIAL SCIENCE References 1 . Ngo T.D., Kashai A., Imbalzano G., Nguyen K.T.Q., Hui D. Additive manufacturing (3D printing): a review of materials, methods, applications and challenges. Composites Part B: Engineering , 2018, vol. 143, pp. 172–196. DOI: 10.1016/j.compositesb.2018.02.012. 2. DebRoy T., Wei H.L., Zuback J.S., Mukherjee T., Elmer J.W., Milewski J.O., Beese A.M., Wilson-Heid A., De A., Zhang W. Additive manufacturing of metallic components – process, structure and properties. Progress in Materials Science , 2018, vol. 92, pp. 112–224. DOI: 10.1016/j.pmatsci.2017.10.001. 3. DebRoy T., Mukherjee T., Milewski J.O., Elmer J.W., Ribic B., Blecher J.J., Zhang W. Scienti fi c, technological and economic issues in metal printing and their solutions. Nature Materials , 2019, vol. 18, iss. 10, pp. 1026–1032. DOI: 10.1038/s41563-019-0408-2. Assessment of the Heat Parameters In fl uence on the Process of Electron-Beam Printing of Titanium Alloy Ti64 Kirill Kalashnikov a, * , Denis Gurianov b , Anna Zykova с , Sergey Fortuna d Institute of Strength Physics and Materials Science of the Siberian Branch of the RAS, 2/4, pr. Akademicheskii, Tomsk, 634055, Russian Federation a https://orcid.org/0000-0002-0286-7156, kkn@ispms.tsc.ru , b https://orcid.org/0000-0003-0725-1219, desa-93@mail.ru, c https://orcid.org/0000-0001-8779-3784, zykovaap@mail.ru , d http://orcid.org/0000-0002-2749-8094, s_fortuna@mail.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2020 vol. 22 no. 2 pp. 41–52 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2020-22.2-41-52 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 02 March 2020 Revised: 30 March 2020 Accepted: 14 April 2020 Available online: 15 June 2020 Keywords : Additive manufacturing Electron beam Titanium alloy Titanium wire Funding The research was carried out within the state assignment of Ministry of Science and Higher Education of the Russian Federation, project No. III.23.2.11 ABSTRACT Introduction. At present, mainly conventional manufacturing methods, including isothermal forging/forming of hemispheres from titanium alloy workpieces with subsequent welding, are used to create essential components made of titanium alloys, such as high-pressure balloons for rocket engines. These methods are mainly complex multi- stage processes, and therefore the production of titanium balloons can take a very long time and entail high material costs. The technology of wire-feed electron-beam additive manufacturing considered in this work has become proven in the worldwide scienti fi c and industrial community as a technology that allows increasing the productivity of the manufacturing process of various metal components, as well as reducing material costs by minimizing mechanical treatments. However, despite a large number of advantages of this method, technological features of the process, including geometrical parameters of the printed part, such as shape and height of the structure, the angle of the wall inclination from the printing plane, and others, have a signi fi cant impact on the formed structure. This is due to the fact that the heat process parameters for different con fi gurations of the printed product will have a different impact on the formation of the structure. In this regard , the purpose of the work is to analyze the in fl uence of heat parameters on the process of printing products from titanium alloy Ti64 using the electron-beam additive manufacturing method to identify regularities of structure formation and material properties at different process parameters . Results and discussion . The conducted researches have shown, that at various combinations of electron-beam 3D-printing process parameters, there is an insigni fi cant change of macrostructure of the obtained Ti64 samples. However, due to different heat inputs and solidi fi cation rates, there are differences in microstructure and, therefore, in mechanical properties. The values of ultimate tensile strength and yield strength for obtained samples vary from 851 MPa and 796 MPa to 676 MPa and 574 MPa, respectively. For citation: Kalashnikov K.N., Gurianov D.A., Zykova A.P., Fortuna S.V. Assessment of the heat parameters in fl uence on the process of electron-beam printing of titanium alloy Ti64. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2020, vol. 22, no. 2, pp. 41–52. DOI: 10.17212/1994-6309-2020-22.2-41-52. (In Russian). ______ * Corresponding author Kalashnikov Kirill N. , Junior Staff Scientist Institute of Strength Physics and Materials Science of the Siberian Branch of the RAS, av. Akademicheskii 2/4, 634055, Tomsk, Russian Federation Tel.: +7-913-883-69-62, e-mail: kkn@ispms.tsc.ru