The Paton Welding Journal, 2025, №07

2025 №07 (01)

DOI of Article 10.37434/tpwj2025.07.02

2025 №07 (03)

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The Paton Welding Journal, 2025, #7, 11-17 pages

High temperature titanium alloy TIG welding using activating 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 NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: selinrv@gmail.com

Abstract
High temperature titanium alloys are materials that can withstand high temperatures and maintain their mechanical properties under extreme heat load. 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 impurities as aluminum, vanadium, molybdenum and other elements in their composition 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, 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.
Keywords: high temperature titanium alloy, TIG welding, preheating, welding with fluxes

Received: 19.12.2024
Received in revised form: 04.03.2025
Accepted: 04.07.2025

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Suggested Citation

S.V. Akhonin, V.Yu. Bilous, R.V. Selin, S.L. Schwab, I.K. Petrychenko, L.M. Radchenko (2025) High temperature titanium alloy TIG welding using activating fluxes. The Paton Welding J., 07, 11-17.

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