Automatic Welding, 2018, №08



2018 №08 (04)

DOI of Article 10.15407/as2018.08.05

2018 №08 (06)

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Avtomaticheskaya Svarka (Automatic Welding), #8, 2018, pp. 32-38
 

Influence of the thermal cycle of tig-welding on the structure and properties of pseudo-β-titanium alloys

Akhonin S.V., Belous V.Yu., Selin R.V.

E.O. Paton Electric Welding Institute of the NAS of Ukraine,  11 Kazimir Malevich Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua
 
Abstract
The structural pseudo-β-titanium alloys found a wide application in aircraft and rocket building. However, while producing welded joints of pseudo-β-alloys applying method of fusion welding, the difficulties arise connected with change in the structure and formation of metastable phases in welded joint. In this paper, using the developed mathematical model of the TIG-welding process, the influence of thermal welding cycle on the weld shape, cooling rate and structure of welded joint metal of the pseudo-β-titanium alloy VT19 was investigated. A number of phases in the weld metal, heat-affected zone and base metal was established, the phase composition and its effect on the mechanical properties of welded joints were predicted.
Keywords: argon-arc welding, TIG-welding, high-strength titanium alloys, mathematical modeling
 
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Received: 23.08.2018
Published: 19.07.2018.