Automatic Welding, 2025, №03

2025 №03 (01)

DOI of Article 10.37434/as2025.03.02

2025 №03 (03)

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"Avtomatychne Zvaryuvannya" (Automatic Welding), #3, 2024, pp. 10-16

High-temperature titanium alloy tig welding using fluxes

S.V. Akhonin, V.Yu. Bilous, R.V. Selin, S.L. Schwab, I.K. Petrychenko, L.M. Radchenko

E.O. Paton Electric Welding Institute of the NAS of Ukraine 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: selinrv@gmail.com

High-temperature titanium alloys are materials that can withstand high temperatures and maintain their mechanical properties under extreme thermal stress. The use of high-temperature titanium alloys helps to increase the efficiency of engines and reduce the weight of structures, which in turn leads to reduced fuel consumption and increased overall equipment productivity. Welding of high-temperature titanium alloys is complicated due to the presence of such alloying elements as aluminum, vanadium, molybdenum and others that increase their high-temperature properties. Silicon is one of the elements that effectively increase the high-temperature properties of titanium alloys. However, a significant defect of alloys with silicon is cold cracks in the welds, which occur at temperatures below 700 °C, when the material passes from a ductile to a brittle state. The brittleness of the weld in as-welded state, in turn, is determined by its structure and, with an increase in welding stresses during the cooling process, it leads to the appearance of defects such as cold cracks, the source of which are microcracks, dislocations, etc. In this work, a study was conducted of the influence of the additional technological operations, such as flux welding and preheating before welding, on the structure and mechanical properties of welded joints of a high-temperature titanium alloy of the Ti-6.5Al-5.3Zr- 2.2Sn-0.6Mo-0.5Nb-0.75Si system. 13 Ref., 2 Tabl., 8 Fig.
Keywords: high-temperature titanium alloy, TIG welding, preheating, welding with fluxes


Received: 19.12.2024
Received in revised form: 04.03.2025
Accepted: 08.05.2025

References

1. Gogia, A.K. (2005) High-temperature titanium alloys. Defence Science J., 55(2), 149??173.
2. Eylon, D.S.P.J., Fujishiro, S., Postans, P.J., Froes, F.H. (1984) High-temperature titanium alloys – A review. JOM, 36(11), 55–62.
3. Tabie, V.M., Li, C., Saifu, W., Li, J., Xu, X. (2020) Mechanical properties of near alpha titanium alloys for high-temperature applications – A review. Aircraft Engineering and Aerospace Technology, 92(4), 521–540. DOI: https://doi.org/10.1108/AEAT-04-2019-0086
4. Akhonin., S.V., Bilous, V.Yu., Selin, R.V. et al. (2022) Argon- arc welding of heat-resistant titanium alloy doped with silicon. Avtomatychne Zvaryuvannya, 5, 33–39. DOI: https://doi.org/10.37434/as2022.05.05
5. Zhao, E., Sun, S., Zhang, Y. (2021) Recent advances in silicon containing high temperature titanium alloys. J. of Materials Research and Technology, 14, 3029–3042. DOI: https://doi.org/10.1016/j.jmrt.2021.08.117
6. Selin, R.V., Bilous, V.Yu., Rukhanskyi, S.B. et al. (2023) Influence of preheating on thermal cycle of argon-arc welding of heat-resistant titanium alloy of Ti–Al–Zr–Sn–Mo–Nb– Si system. Avtomatychne Zvaryuvannya, 12, 18–23. DOI: https://doi.org/10.37434/as2023.12.03
7. Akhonin, S.V., Belous, V.Y., Selin, R.V., Schwab, S.L. (2023) Effect of TIG-welding on the structure and mechanical properties of low-cost titanium alloy Ti-2.8 Al-5.1 Mo-4.9 Fe welded joints. Mat. Sci. Forum, 1095, 105–110. DOI: https://doi.org/10.4028/p-2njAz3
8. Akhonin, S.V., Belous, V.Y., Selin, R.V. (2022) Effect of preheating and post-weld local heat treatment on the microstructure and mechanical properties of low-cost β-titanium alloy welding joints, obtained by EBW. Defect and Diffusion Forum, 416, 87–92. DOI: https://doi.org/10.4028/p-o8uehr
9. Prilutsky, V.P., Akhonin, S.V. (2014) TIG welding of titanium alloys using fluxes. Welding in the World, 58, 245–251. DOI: https://doi.org/10.1007/s40194-013-0096-5
10. Sun, Z., Pan, D. (2004) Welding of titanium alloys with activating flux. Sci. and Technol. of Welding and Joining, 9(4), 337–344. DOI: https://doi.org/10.1179/136217104225021571
11. Zamkov, V.N., Prilutsky, V.P., Gurevich, S.M. (1977) Influence of flux composition on the non-consumable electrode welding of titanium. Avtomatich. Svarka, 4, 22–26.
12. Gurevich, S.M., Zamkov, V.N., Blashchuk, V.E. et al. (1986) Metallurgy and technology of welding of titanium and its alloys: Monograph. Kyiv, Naukova Dumka.
13. Gurevich, S.M. (1961) Fluxes for automatic welding of titanium alloys. Aviats. Promyshlennost, 5, 55–59.