The Paton Welding Journal, 2026, №09

2026 №09 (06)

DOI of Article 10.37434/tpwj2026.09.07

2026 №09 (08)

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The Paton Welding Journal, 2026, #9, 64-73 pages

Influence of arc 3D printing parameters on the mechanical properties of Inconel 625 deposit

S.I. Motrunich¹, O.V. Yarovytsyn¹, I.R. Volosatov¹, D.S. Tomko², Ji Junwen^2,3

¹E.O. Paton Electric Welding Institute of the NASU. 11 Kazymyr Malevych Str., 03150, Kyiv, Ukraine. E-mail: motrunich@nas.gov.ua
²National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute” 37 Prosp. Beresteiskyi, 03056, Kyiv, Ukraine
³Technical University of Munich 21 Arcisstrasse, Munich, Bavaria, 80333, Germany

Abstract
The influence of wire arc additive manufacturing (WAAM) process parameters using a consumable wire electrode in shielding gas environment on the mechanical properties of a multilayer nickel-based superalloy Inconel 625 deposit in the as-built condition in the temperature range of 20–1100 °C was investigated. Full-size cylindrical specimens of 5×M10 diameter 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 examinations 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 deformability of the produced Inconel 625 deposit is analyzed from the viewpoint of the known increased resistance of the alloy to two subtypes of hot cracks by the solid-state 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 process in the temperature range of 600–900 °C significantly reduces the ultimate tensile strength, yield strength, and ductility values for the produced Inconel 625 deposit, particularly at a temperature of 800 °C — approximately by 1.5 times. For Inconel 625 alloy, a comparison of experimental data on ultimate tensile strength for the WAAM-deposited metal and corresponding published data for industrial conventionally manufactured semi-finished products was made.
Keywords: wire arc additive manufacturing, WAAM process, Inconel 625 alloy, deposit, microstructure, short-term mechanical properties, elevated temperatures

Received: 13.10.2026
Received in revised form: 12.05.2026
Accepted: 24.09.2026

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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 deposit. The Paton Welding J., 09, 64-73. https://doi.org/10.37434/tpwj2026.09.07

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