| 2026 №04 (04) |
DOI of Article 10.37434/as2026.04.05 |
2026 №04 (06) |
"Avtomatychne Zvaryuvannya" (Automatic Welding), #4, 2026, pp. 45-55
Influence of arc 3D printing parameters on the mechanical properties of Inconel 625 cladding metal
S.I. Motrunich1
, O.V. Yarovytsyn1, I.R. Volosatov1, D.S. Tomko2, Ji Junwen2,3
1E.O. Paton Electric Welding Institute of the NAS of Ukraine
11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine.
E-mail: motrunich@nas.gov.ua
2National Technical University of Ukraine «Igor Sikorsky Kyiv Polytechnic Institute». 37 Beresteysky Ave., 03056, Kyiv, Ukraine.
3Technical University of Munich. 21, Arcisstraße 21, Munich, Bavaria, 80333, Germany.
The influence of wire arc additive manufacturing (WAAM) process parameters using consumable wire electrode in shielding gas environment on the mechanical properties of multi-layer deposited metal of nickel-based superalloy Inconel 625 in the «asbuilt » structural condition in the temperature range of 20…1100 °C was investigated. Full-size cylindrical specimens Ø5×M10 at 20 °C and miniature flat proportional specimens with a working part cross-section of 2.5×2.5 mm at 20…1100 °C were manufactured and tested from a fabricated wall-type vertical structure. Results of metallographic investigations performed by scanning electron microscopy are presented, showing the features of columnar dendritic structure and morphology of secondary phases in different zones of the fabricated component. The deformation capacity of the obtained deposited metal of Inconel 625 alloy is analyzed from the viewpoint of the known increased resistance of this alloy to two subtypes of hot cracks by the «solidstate cracking» mechanism. It is shown that the transition from Ar shielding gas to a mixture of 97.5 % Ar + 2.5 % CO₂ when using WAAM additive technology in the temperature range of 600…900 °C significantly reduces the ultimate tensile strength, yield strength, and ductility values for the obtained deposited metal of Inconel 625 alloy, particularly at a temperature of 800 °C – approximately by a factor of 1.5. For Inconel 625 alloy, a comparative analysis of experimental data on short-term strength for metal deposited by WAAM additive technology and corresponding published data for industrial semi-finished products manufactured by traditional technologies was performed. 21 Ref., 6 Tabl., 8 Fig.
Keywords: wire arc additive manufacturing, WAAM, Inconel 625, nickel-based superalloy, mechanical properties, elevated temperatures, solid-state cracking, shielding gas, microstructure
Received: 13.10.2025
Received in revised form: 12.05.2026
Accepted: 20.07.2026
Posted online: 24.07.2026
References
1. Amiri, V., Naffakh-Moosavy, H. (2024) Wire arc additive manufacturing of functionally graded carbon steel - stainless steel 316L - Inconel 625: Microstructural characterization and mechanical behavior. J. of Advanced Joining Processes, 9, 100194. https://doi.org/10.1016/j.jajp.2024.1001942. Mohanraj, R., Abdul Basith, S.N., Chandru, S. et al. (2024) A review on microstructure and mechanical properties of Inconel 625 alloy fabricated using wire arc additive manufacturing process. Rapid Prototyping J., 30(7), 1337-1347. https://doi.org/10.1108/RPJ-11-2023-0387
3. Gurmesa, F.D., Lemu, H.G., Tucho, W.M., Muleta, B.B. (2025) Impacts of wire diameter on microstructure and hardness of Inconel 625 fabricated by wire arc additive manufacturing. J. of Materials Research and Technology, 37, 5423-5435. https://doi.org/10.1016/j.jmrt.2025.07.175
4. Markanday, J.F.S. (2022) Applications of alloy design to cracking resistance of additively manufactured Ni-based alloys. Mater. Sci. and Technol., 38(16), 1300-1314. https://doi.org/10.1080/02670836.2022.2068759
5. Ghoussoub, J.N., Tang, Y.T., Dick-Cleland, W.J.B. et al. (2022) On the influence of alloy composition on the additive manufacturability of Ni-based superalloys. Metallurgical and Materials Transact. A, 53A, 962-983. https://doi.org/10.1007/s11661-021-06568-z
6. Wei, Q., Xie, Y., Teng, Q. et al. (2022) Crack types, mechanisms, and suppression methods during high-energy beam additive manufacturing of nickel-based superalloys: A review. Chinese J. of Mech. Eng.: Additive Manufacturing Frontiers, 1(4), 100055. https://doi.org/10.1016/j.cjmeam.2022.100055
7. Rodrigues, T.A., Cipriano Farias, F.W., Avila, J.A. et al. (2023) Effect of heat treatments on Inconel 625 fabricated by wire and arc additive manufacturing: An in situ synchrotron X-ray diffraction analysis. Sci. and Technol. of Welding and Joining, 28(7), 534-539. https://doi.org/10.1080/13621718.2023.2187927
8. Singh, J.B. (2022) Alloy 625. Microstructure, Properties and Performance. Singapore, Springer Nature Singapore Pte Ltd. https://doi.org/10.1007/978-981-19-1562-8
9. Saravanakumar, K., Balaji, V.G., Srijha, T. et al. (2024) Analysis of microstructure and mechanical properties of Inconel 625 alloy by wire arc additive manufacturing (WAAM). Archives of Metallurgy and Materials, 69(3), 1079-1086. https://doi.org/10.24425/amm.2024.150928
10. Pratheesh Kumar, S., Elangovan, S., Mohanraj, R., Ramakrishna, J.R. (2021) A review on properties of Inconel 625 and Inconel 718 fabricated using direct energy deposition. Materials Today: Proceedings, 46(17), 7892-7906. https://doi.org/10.1016/j.matpr.2021.02.566
11. Madesh, R., Gokul Kumar, K. (2023) Multi-layer additive manufacturing on nickel-based superalloy by optimization of pulsed mode process parameters of single-layer bead geometry. Materials Today Communications, 37, 107463. https://doi.org/10.1016/j.mtcomm.2023.107463
12. Ravi, G., Murugan, N., Arulmani, R. (2020) Microstructure and mechanical properties of Inconel-625 slab component fabricated by wire arc additive manufacturing. Mater. Sci. and Technol., 36(16), 1785-1795. https://doi.org/10.1080/02670836.2020.1836737
13. Rashid, M., Sabu, S., Kunjachan, A. et al. (2024) Advances in wire-arc additive manufacturing of nickel-based superalloys: Heat sources, DfAM principles, material evaluation, process parameters, defect management, corrosion evaluation and post-processing techniques. Intern. J. of Lightweight Mater. and Manuf., 7(6), 882-913. https://doi.org/10.1016/j.ijlmm.2024.05.009
14. Ajithkumar, S., Arulmurugan, B., Manikandan, M. et al. (2025) Role of shielding gas in tailoring microstructure and anisotropy in wire arc additive manufactured Inconel 686. Scientific Reports, 15, 21192. https://doi.org/10.1038/s41598-025-08197-7
15. DuPont, J.N., Lippold, J.C., Kiser S.D. (2009) Welding metallurgy and weldability of nickel-base alloys. Hoboken, John Wiley & Sons. https://doi.org/10.1002/9780470500262
16. Ji, J., Zavdoveev, A., Vedel, D. et al. (2023) CMT-based wire arc additive manufacturing of Inconel 625 alloy. Emerging Materials Research, 12(3), 315-322. https://doi.org/10.1680/jemmr.23.00053
17. Yushchenko, K.A., Yarovitsyn, A.V., Chervyakov, N.O. et al. (2019) Evaluation of short-term mechanical properties of a joint of difficult-to-weld nickel high-temperature alloys of ZhS6 type. The Paton Welding J., 7, 29-35. https://doi.org/10.15407/tpwj2019.07.07
18. Costa, J.F.M., Jorge, J.C.F., de Souza, L.F.G. et al. (2024) Microstructural evaluation of Inconel 625 weld cladding deposited by the GMAW and GMAW with rotating electrode processes. Tecnologia em Metalurgia Materiais e Mineração, 21, e2848. https://doi.org/10.4322/2176-1523.20242848
19. Yarovytsyn, O., Cherviakov, M., Zviahintseva, H. et al. (2024) On the issue of assessing the probability and preventing the occurrence of «ductility dip cracking» mechanism under conditions of multi-layer welding arc 3D-overlaying process on nickel and cobalt alloys. In: Proc. of the 77th IIW Annual Assembly. Commission IX-H «Behavior of Metals Subjected to Welding», IIW Doc. IX-H-973-2024, 7-12 July 2024, Rhodes, Greece.
20. de Oliveira, M.M., Couto, A.A., Almeida, G.F.C. et al. (2019) Mechanical behavior of Inconel 625 at elevated temperatures. Metals, 9(3), 301-312. https://doi.org/10.3390/met9030301
21. Special Metals Corporation (2013) Inconel® alloy 625. Technical Bulletin. www.specialmetals.com/documents/technical-bulletins/inconel/inconel-alloy-625.pdf
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Suggested Citation
S.I. Motrunich, O.V. Yarovytsyn, I.R. Volosatov, D.S. Tomko, Ji Junwen (2026) Influence of arc 3D printing parameters on the mechanical properties of Inconel 625 cladding metal. Automatic Welding, 04, 45-55. https://doi.org/10.37434/as2026.04.05Advertising in this issue:
