Electrometallurgy Today, 2026, №01

2026 №01 (04)

DOI of Article 10.37434/sem2026.01.05

2026 №01 (06)

---

"Suchasna Elektrometallurgiya" (Electrometallurgy Today), 2026, #1, 38-47 pages

Comprehensive approach to determining parameters for repair of titanium parts of the gas-air tract of gas turbine engines

V.S. Yefanov¹ , O.V. Ovchynnykov¹ , H.M. Laptieva² , Yu.V. Polishchuk¹ , K.M. Sukhyy¹

¹Ukrainian State University of Science and Technologies. 2 Lazaryan Str., 49010, Dnipro, Ukraine E-mail: vsyefanov@gmail.com
²National University “Zaporizhzhia Polytechnic”. 64 Universytetska Str., 69063, Zaporizhzhia, Ukraine

Abstract
The prospects and economic efficiency of titanium alloy products primarily depend on their service life, and this is directly related to the possibility of restoring these parts. The maintainability of gas turbine engine (GTE) parts generally determines their competitiveness. The authors proposed the use of filler materials with a submicrocrystalline structure for the repair of gas turbine engine parts by welding methods. Their optimal chemical composition, manufacturing method, and measures for regulating the structure of such filler materials were established. The optimal parameters of the argon-arc welding mode and post-weld heat treatment were also determined. The mechanical properties of welded joints obtained using experimental filler materials are higher compared to samples obtained using serial filler materials. The macro- and microstructure of welded joints has a significantly smaller number of defects of various origin compared to samples made with serial welding materials. Modeling and calculation of a monowheel using the finite element method was performed to predict the zones and degree of destruction during operation in order to develop an optimal restoration technology. 25 Ref., 2 Tabl., 9 Fig.
Keywords: titanium alloy, welding materials, welded joint, chemical composition, structure, mechanical properties, defects

Received: 04.11.2025
Received in revised form: 12.01.2026
Accepted: 31.03.2026
Posted online: 14.04.2026

References

1. Ostash, O.P., Fedirko, V.M., Uchanin, V.M. et al. (2007) Mechanics of structure and value of materials. Ed. by O.P. Ostash, V.M. Fedirko. Lviv, Spolom [in Ukrainian].
2. (1994) Materials properties handbook: Titanium alloys. Eds by R. Boyer, G. Welsch, E.W. Collings. ASM International. The Material Information Society.
3. Pogrelyuk, I.M., Fedirko, V.M. (2011) Problems of surface engineering of titanium alloys. Ed. by V.V. Panasyuk. Lviv, Spolom, 121-138 [in Ukrainian].
4. Crossley, F.A. (1985) Elevated temperature mechanical properties of transage 175 alloys (Ti-2.3Al-13V-7Sn-2Zr). SAMPE Quarterly, 17(3), 5-12.
5. Ovchinnikov, O.V. (2004) Influence of structural officials in the field of ruining titanium alloys. Mashynoznavstvo, 1(79), 47-50 [in Ukrainian].
6. Johnsen, M.R. (1999) Friction stir welding takes off at boeing. Welding J., (2), 35-39.
7. Petrik, I.A. (2007) Welding and brazing restoration processes of gas turbine engine blades made of difficult-to-weld nickeland titanium-based alloys: Abstract of PhD thesis. ZNTU, 22 [in Ukrainian].
8. Chao, Y.J., Qi, X. (1998) Thermal and thermo-mechanical modeling of friction stir welding of aluminum alloy 6061-T6. J. of Materials Processing & Manufacturing Science, 7(2), 215-233. https://doi.org/10.1106/LTKR-JFBM-RGMV-WVCF
9. Frigaard, O., Grong, O., Midling, O.T. (2001) A process model for friction stir welding of age hardening aluminum alloys. Metallurgical and Materials Transact. A: Physical Metallurgy and Materials Science, 32(5), 1189-1200. https://doi.org/10.1007/s11661-001-0128-4
10. Ryabtsev, A.D., Friedrich, B., Troyansky, A. (2011) The refining and alloying of titanium in the process of chamber electroslag remelting. In: Proc. of the Inter. Workshop on Metal-Slag Interactions on Slags and Fluxes in Modern Metallurgy, September 14-19, Yalta, Crimea, Ukraine. Aachen, Shaker Verlag, 175-188.
11. Fedirko, V.M., Pogrelyuk, I.M., Yaskiv, O.I. (2009) Thermal diffusion multicomponent saturation of titanium alloys. Kyiv, Naukova Dumka [in Ukrainian].
12. Tang, W., Guo, X., McClure, J.C. (1998) Heat input and distribution temperature in friction stir welding. J. of Materials Processing & Manufacturing Science, 7(2), 163-172. https://doi.org/10.1106/55TF-PF2G-JBH2-1Q2B
13. Thomas, W.M., Johnson, K.I., Wiesner, C.S. (2003) Friction stir welding: recent developments in tool and process technologies. Advanced Engineering Materials, 5(7), 485-490. https://doi.org/10.1002/adem.200300355
14. Nalwa, H.S. (2001) Nanostructured materials and technology. Elsevier.
15. Ajayan, P.M. (2003) Nanocomposite science and technology. Wiley-VCH GmbH Co. https://doi.org/10.1002/3527602127
16. Kelsall, R. (2005) Nanoscale science and technology. Wiley and Sons. https://doi.org/10.1002/0470020873
17. Ivanishenko, Yu., Kurmanaeva, L., Weissmueller, J. (2009) Deformation mechanisms in nanocrystalline palladium at large strains. Acta Materialia, 57, 3391-3401. https://doi.org/10.1016/j.actamat.2009.03.049
18. Zhu, Y., Kolobov, Yu.R., Grabovetskaya, G.P. et al. (2003) Microstructures and mechanical properties of ultrafine-grained Ti foil processed by equal-channel pressing and cold rolling. J. of Materials Research, 18(4), 1011-1016. https://doi.org/10.1557/JMR.2003.0138
19. Valiev, R.Z., Islamgaliev, R.C., Alexandrov, I.V. (2000) Bulk nanostructured materials from severe plastic deformation. Progress in Materials Science, 45, 103-189. https://www.sciencedirect.com/science/article/abs/pii/S0079642599000079?via%3Dihub https://doi.org/10.1016/S0079-6425(99)00007-9
20. Stolyarov, V.V., Latysh, V.V., Valiev, R.Z. et al. (2000) Investigation and application of severe plastic deformation. NATO Science Series, 3, 80-91.
21. Carleton University (2025) Element Mapping. https://serc.carleton.edu/msu_nanotech/methods/elementmapping.html
22. Zherebtsov, S., Salishev, G., Galeev, R. et al. (2005) Mechanical properties of submicrocrystalline Ti-6Al-4V titanium alloy produced by severe plastic deformation. J. of JSEM, 5(3), 92-96.
23. Varyukhin, V., Beygelzimer, Y., Kulagin, R., Reshetov, A. (2011) Obtaining nanostructured titanium by twist extrusion. In: Proc. of the 12th World Conf. on Titanium, Vol. III, 2011. https://cdn.ymaws.com/titanium.org/resource/resmgr/ZZ_WTCP_2011_Re-Do/V3/2011_Vol.3-3-Obtaining_Nanos.pdf
24. (2016) ASTM E8/E8M Standard test methods for tension testing of metallic materials. https://www.astm.org/e8_e8m-16.html
25. (2020) DSTU EN ISO/IEC 17025:2019: General requirements for the competence of testing and calibration laboratories [in Ukrainian]. https://www.scribd.com/document/53054 6617/%D0%94%D0%A1%D0%A2%D0%A3317025-2019

---

This article is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

---

Suggested Citation

V.S. Yefanov, O.V. Ovchynnykov, H.M. Laptieva, Yu.V. Polishchuk, K.M. Sukhyy (2026) Comprehensive approach to determining parameters for repair of titanium parts of the gas-air tract of gas turbine engines. Electrometallurgy Today, 01, 38-47. https://doi.org/10.37434/sem2026.01.05