Eng
Ukr
Rus
Print
2024 №04 (03) DOI of Article
10.37434/as2024.04.04
2024 №04 (05)

Automatic Welding 2024 #04
"Avtomatychne Zvaryuvannya" (Automatic Welding), #4, 2024, pp. 32-41

High-temperature creep testing of difficult-to-weld nickel-based superalloy samples with micro-plasma powder deposition

O.V. Yarovytsyn, M.O. Chervyakov, O.O. Nakonechnyi, O.O. Fomakin, S.O. Voronin, O.F. Yavdoshchina

E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: yarovytsyn@ukr.net

The procedure of high-temperature uniaxial сrеер testing for welded joints of “base-deposited metal” made of difficult-to-weld nickel-based superalloys of ZhS32 type, containing more than 60 vol. % of the strengthening γ΄-phase, has been developed. It allows using witness samples to estimate the сrеер strength level at temperatures of 975 and 1000°С for the conditions of restoration of the edges of serial blades of modern aircraft gas turbine engines by micro-plasma powder welding deposition process. Its development took into account the need to go to larger sizes and, accordingly, the higher restraint conditions of the welded workpieces for manufacture of samples for mechanical tests, compared to typical conditions of serial restoration of the blade edge in industry, and some methods for hot cracks prevention were also proposed. Its feature is the use of “dovetail” type grips for samples with the working part of 7.5-9.0 mm2, which allows significantly reducing their size. The proposed approach of choosing the shape and dimensions of the sample, the technique of preparing and forming the welded workpieces necessary for it by micro-plasma powder deposition allows significantly reducing the heat input, bringing the deposition modes of the witness samples closer to the industrial modes of serial restoration of the edges of blades of aircraft gas turbine engines. Due to that, it was possible to avoid the known manifestations of the tendency to crack formation during the deposition process and post weld heat treatment in the welded joints of the “base-deposited metal” of the nickel-based superalloys with directional crystallization, which are the workpieces for subsequent production of such witness samples. The developed procedure was tested to evaluate the creep strength of ZhS32 deposited metal samples and “50% base (ZhS26-VI or Zh32-VI) + 50% deposited (ZhS32) metal” samples at 975°C and 1000°C on the base of 40 hours holding and comparison of the relevant experimental data with the technical condition requirements for these cast nickel-based superalloys. 22 Ref., 3 Tabl., 11 Fig.
Keywords: micro-plasma powder welding deposition, welded joint of “base-deposited metal”, difficult-to-weld nickel-based superalloys, сrеер strength

Received: 04.04.2024
Received in revised form: 18.05.2024
Accepted: 08.07.2024

References

1. Crossland, B. Bahrani, A.S. Willia, J.D. Shribman, V. (1967) Explosive welding of tubes to tubeplates. Welding and Metal Fabrication, 35, 88-94.
2. Harry, J. Addison, Jr. James, F. Kowalick, Winston W. Cavtll (1969) Explosion welding of cylindrical shapes. Report A69-3 of the department of the army frankford arsenal, Philadelphia. https://doi.org/10.21236/AD0694359
3. Yong, Yu, Honghao, Ma, Kai, Zhao et al. (2017) Study on Underwater Explosive Welding of Al-Steel Coaxial Pipes. Central European J. of Energetic Materials, 14 (1), 251-265. https://doi.org/10.22211/cejem/68696
4. Moujin Lin, Junjie Liao, Bing Xue, Dingjun Xiao, Jiangliang Li, Jing Ling (2023) Expansion velocity of metal pipe in underwater explosive welding. J. Mater. Proc. Technol., 319, October 2023, 118071. https://doi.org/10.1016/j.jmatprotec.2023.118071
5. Sina Gohari Rad, Siamak Mazdak, Ali Alijani (2023) Proposing an analytical model for predicting the dimensions of interfacial waves produced in the explosive welding of coaxial cylinders. Thin-Walled Structures, 190, September 2023, 110982. https://doi.org/10.1016/j.tws.2023.110982
6. DSTU EN 13601:2010 Copper and copper alloys. Copper rod, bar and wire for general electrical purposes. Specifications.
7. Bryzgalin, A.G., Dobrushin, L.D., Shlensky, P.S. et al. (2015) Manufacture of coaxial copper-aluminium rods using explosion welding and drawing. The Paton Welding J., 3-4, 69-73. https://doi.org/10.15407/tpwj2015.04.10
8. Lysak, V.I., Kuzmin, S.V. (2005) Explosion welding. Moscow, Mashinostroenie [in Russian].
9. Pervukhin, L.B., Shishkin, T.A., Pervukhina, O.L. (2012) Specificity of explosive welding in marginal zones. In: Proc. of Symp. on Explosive Production of New Materials: Science, Technology, Business, and Innovations. Moscow, Torus Press Ltd.
10. Pashchin, M.O., Shlonskyi, P.S., Bryzgalin, A.G. et al. (2021) Features of formation of structure of coaxial joints of copper and aluminium in explosion welding with vacuuming of welding gap. The Paton Welding J., 2, 2-7. https://doi.org/10.37434/as2021.02.01
11. Method of manufacturing of bimetal pipe adapters using explosion welding. Appl. for invent. No. 2022 02799 from 05.08.2022.
12. Shlyonskyi, P.S. (2020) Explosion welding of copperaluminium pipes by the "reverse scheme". The Paton Welding J., 8, 51-53. https://doi.org/10.37434/as2020.08.08
13. Bryzgalin, A.G., Pekar, E.D., Shlensky, P.S. et al. (2017) Application of explosion welding for manufacture of trimetallic transition pieces of cryomodules of linear collider. The Paton Welding J., 12, 34-39. https://doi.org/10.15407/as2017.12.04
14. Basti, A., Bedeschi, F., Bryzgalin, A. et al. (2020) Upgrade of the ILC cryomodule. arXiv.org > physics > arXiv:2004.05948. https://doi.org/10.1134/S1063779620060027
15. Sabirov, B., Basti, A., Bedeschi, F. et. al. (2016) High Technology Application to Modernization of International Electron-Positron Linear Collider (ILC). In: Proc. of Int. Conf. on New Trends in High-Energy Physics, Montenegro.
16. Bryzgalin, A.G., Shlyonskyi, P.S., Pekar, E.D. et al. (2022) Joining building rebars using couplings compressed by explosion. The Paton Welding J., 11, 35-38. https://doi.org/10.37434/as2022.11.05
17. DSTU B V. 2.6-169:2011 Welded joints of rebars and embedded products of concrete structures.
18. Lobanov, L.M., Illarionov, S.Yu., Dobrushin, L.D. et al. (2012) Repair explosion cladding of threaded channel of car axles. The Paton Welding J., 2, 42-46.

Advertising in this issue: