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2021 №05 (04) DOI of Article
2021 №05 (06)

Automatic Welding 2021 #05
Avtomaticheskaya Svarka (Automatic Welding), #5, 2021, pp. 34-39

Argon-arc welding of high-strength sparsely-doped pseudo-β-Titanium Alloy Ti–2.8Al–5.1Mo–4.9Fe

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

E.O. Paton Electric Welding Institute of the NAS of Ukraine. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: office@paton.kiev.ua

Structural sparsely-doped titanium alloys are developed with the purpose of lowering the finished product cost. Possibility of application of tungsten electrode argon-arc welding (AAW) for sparsely-doped pseudo-β-titanium alloy Ti–2.8Al–5.1Mo–4.9Fe was evaluated. Influence of different kinds of argon-arc welding on weld formation and mechanical properties of Ti–2,8Al–5,1Mo–4,9Fe alloy joints were assessed. The effect of complete penetration AAW, semi-submerged AAW AAW with feeding unalloyed titanium welding filler wire VT1-00sv was studied. It was found that the structure of metal of the weld and HAZ in welded joints of sparselydoped titanium alloy Ti–2.8Al–5.1Mo–4.9Fe made by AAW consists mainly of β-phase with precipitates of metastable α-phase. Lowering of AAW heat input for Ti–2.8Al–5.1Mo–4.9Fe alloy has a positive impact on the joint strength. So, among the welded joints made without changing the weld metal composition, the joints made by semi-submerged arc welding have the highest strength of 972 MPa and the highest impact toughness on the level of 5.7 J/cm2. 15 Ref., 3 Tabl., 3 Fig.
Keywords: titanium, titanium alloys, argon-arc welding, heat input, flux, wire, mechanical properties

Received: 16.04.2021


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