The Paton Welding Journal, 2025, №06

2025 №06 (05)

DOI of Article 10.37434/tpwj2025.06.06

2025 №06 (07)

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The Paton Welding Journal, 2025, #6, 36-45 pages

The effect of annealing on the structure and properties of welded joints of heat-resistant pseudo-α-titanium alloy Ti‒Al‒Zr‒Sn‒Mo‒Nb‒Si alloying system

S.V. Akhonin¹, V.Yu. Bilous¹, V.V. Pashynskyi², R.V. Selin¹, A.Iu. Severin¹, E.L. Vrzhyzhevskyi¹

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: belousvy@gmail.com
²Technical University “Metinvest Polytechnic” LLC. 80 Pivdenne Highway, 69008, Zaporizhzhia, Ukraine

Abstract
The effect of furnace annealing after electron beam welding (EBW) and gas tungsten arc welding (GTAW ) on the properties of welded joints of a pseudo-α-titanium alloy of the Ti‒Al‒Zr‒Sn‒Mo‒Nb‒Si system was investigated. To compare the properties of welded joints in the as-welded state and after additional heat treatment, a quality criterion was introduced. It was established that annealing promotes the formation of a finer microstructure in the welded joints of the heat-resistant pseudo-α-titanium alloy of Ti‒Al‒Zr‒Sn‒Mo‒Nb‒Si alloying system produced by EBW, resulting in a tensile strength of 980 MPa, which is 95 % of the base metal strength; the impact toughness of the annealed welded joints remained high at 17.9 J/cm2. Annealing after GTAW also leads to microstructural refinement of the welded joints. A comparative analysis of the quality coefficients of EB and GTA welded joints demonstrated the superior combination of mechanical properties in EB joints, both in the as-welded state and after annealing. Annealing application enabled an improvement in the mechanical properties of EB joints to levels comparable to those achieved with additional local heat treatment (LHT).
Keywords: heat-resistant titanium alloy, microstructure, mechanical properties, electron beam welding, gas tungsten arc welding

Received: 27.03.2025
Received in revised form: 07.05.2025
Accepted: 27.06.2025

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Suggested Citation

S.V. Akhonin, V.Yu. Bilous, V.V. Pashynskyi, R.V. Selin, A.Iu. Severin, E.L. Vrzhyzhevskyi (2025) The effect of annealing on the structure and properties of welded joints of heat-resistant pseudo-α-titanium alloy Ti‒Al‒Zr‒Sn‒Mo‒Nb‒Si alloying system. The Paton Welding J., 06, 36-45.

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