Automatic Welding, 2023, №12



2023 №12 (02)

DOI of Article 10.37434/as2023.12.03

2023 №12 (04)

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Avtomaticheskaya Svarka (Automatic Welding), #12, 2023, pp. 18-23

Influence of pre-heating on TIG-welding thermal cycle of high-temperature titanium alloy of TI‒AL‒ZR‒SN‒MO‒NB‒SI system

R.V. Selin¹, V.Yu. Bilous¹, S.B. Rukhanskyi¹, I.B. Selina², L.M. Radchenko¹

¹E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
²National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute» 37 Prospect Beresteiskyi (former Peremohy), 03056, Kyiv, Ukraine

The main direction of improving the operational characteristics of titanium alloys is the creation of heat resistant and high temperature titanium alloys. The high specific strength and corrosion resistance of this type of alloys, at temperatures up to 500…600 °С, enables making them the main structural material for aircraft and rocket engineering. However, their widespread use is associated with the problem of precipitation of brittle phases during welding, which requires the use of additional technological operations, such as local heat treatment or pre-heating. In this paper, the finite element modeling method was applied to study the influence of the TIG welding thermal cycle of the high temperature titanium alloy of Ti‒6.5Al‒5.3Zr‒2.2Sn‒0.6Mo‒0.5Nb‒0.75Si system with and without the use of pre-heating and to plot the cooling rates diagrams of the produced welded joints. Ref. 10, Tabl. 2, Fig. 12.
Keywords: high temperature titanium alloy, TIG welding, finite element modeling, pre-heating


Received: 13.03.2023

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