The Paton Welding Journal, 2025, №12

2025 №12 (07)

DOI of Article 10.37434/tpwj2025.12.01

2025 №12 (02)

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The Paton Welding Journal, 2025, #12, 3-10 pages

Structure and properties of welded joints of PT-3V titanium alloy produced by narrow-gap welding

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

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: akhonin.sv@gmail.com

Abstract
Narrow-gap gas tungsten arc welding is an efficient and economical method for producing joints in thick titanium alloys. A key feature of the developed technology is the stable chemical composition of the weld metal, with the proportion of base metal in the weld reaching 89–91%. This work examines the influence of filler material on the structure and properties of welded joints in PT-3V titanium alloy produced by narrow-gap welding with a tungsten electrode and magnetically controlled arc. Filler wires of grades 2V and SPT2 provide high-quality formation of a concave weld bead surface during narrow-gap welding of PT-3V titanium alloy. The tensile strength of welded joints produced using 2V filler wire reaches 643 MPa, corresponding to 86 % of the strength of the base metal. The use of SPT2 filler wire for narrow-gap welding of PT-3V titanium alloy made it possible to obtain a weld metal structure similar to that of the base metal and to achieve weld strength equivalent to that of the base metal in the as-welded condition.
Keywords: titanium, titanium alloy, pseudo-α alloys, gas tungsten arc welding, narrow-gap welding, controlling magnetic field, filler wire, microstructure, mechanical properties

Received: 10.07.2025
Received in revised form: 17.07.2025
Accepted: 18.12.2025

References

1. Hori, K., Heneda, M. (1999) Narrow gap arc welding. J. of the JWC, 3, 41-62. https://doi.org/10.2207/qjjws1943.68.179
2. Jae-Ho Jun, Sung-Ryul Kim, Sang-Myung Cho (2016) A study on productivity improvement in narrow gap TIG welding. J. of Welding and Joining, 34 (1), 68-74. https://doi.org/10.5781/JWJ.2016.34.1.68
3. Gaurav Dak, Navneet Khanna, Chandan Pandey (2023) Study on narrow gap welding of martensitic grade P92 and austenitic grade AISI 304L SS steel for ultra-supercritical power plant application. Archiv. Civ. Mech. Eng., 23(14), https://doi.org/10.1007/s43452-022-00540-3
4. Fang, N., Guo, E., Huang, R. et al. (2021) Effect of welding heat input on microstructure and properties of TC4 titanium alloy ultra-narrow gap welded joint by laser welding with filler wire. Materials Research Express, 8(1), 016511. https://doi.org/10.1088/2053-1591/abd4b3
5. Akhonin, S.V., Belous, V.Yu., Romanyuk, V.S. et al. (2010) Narrow-gap welding of up to 110 mm thick high-strength titanium alloys. The Paton Welding J., 5, 34-38. https://patonpublishinghouse.com/eng/journals/as/2010/05/07
6. Dong, Z., Tian, Y., Zhang, L. et al. (2024) Research status of high efficiency deep penetration welding of medium-thick plate titanium alloy: A review. Defence Technology, 45, March, 178-202. https://doi.org/10.1016/j.dt.2024.08.004
7. Fang, D.S. (2017) Study on the characteristics of three-wire indirect arc and its thick-wall narrow gap welding process under gas protection: Ph.D. Thesis, Dalian University of Technology, Dalian, China.
8. Akhonin, S.V., Bilous, V.Yu., Selin, R.V. et al. (2023) Narrow-gap TIG welding of thick steel 20. The Paton Welding J., 6, 21-26. https://doi.org/10.37434/as2023.06.04
9. Ding, L., Qin, B., Ge, K. et al. (2023) Microstructures and mechanical properties of thick Ti-6Al-3Nb-2Zr-1Mo joint by magnetron-controlled narrow gap TIG welding. Metals and Materials Inter., 29(8), 2304-2315. https://doi.org/10.1007/s12540-022-01367-6
10. Wan, L., Huang, Y., Lv, S. et al. (2016). Narrow-gap tungsten inert gas welding of 78-mm-thick Ti-6Al-4V alloy. Materials Sci. and Technology, 32(15), 1545-1552. https://doi.org/10.1080/02670836.2015.1131941
11. Xinyu Bao Yonglin Ma, Shuqing Xing, Yongzhen Liu, Weiwei Shi (2022) Effects of pulsed magnetic field melt treatment on grain refinement of Al-Si-Mg-Cu-Ni alloy direct-chill casting billet. Metals, 12(7), 1080. https://doi.org/10.3390/met12071080
12. Belous, V.Yu., Akhonin, S.V. (2011) Formation of narrow-gap welded joints on titanium using the controlling magnetic field. The Paton Welding J., 4, 19-23. https://patonpublishinghouse.com/eng/journals/as/2011/04/04
13. Yujun Hu, Hongjin Zhao, Xuede Yu et al. (2022) Research progress of magnetic field regulated mechanical property of solid metal materials, Metals, 12, 1988. https://doi.org/10.3390/met12111988

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Suggested Citation

S.V. Akhonin, V.Yu. Bilous, R.V. Selin (2025) Structure and properties of welded joints of PT-3V titanium alloy produced by narrow-gap welding. The Paton Welding J., 12, 3-10.

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