Issues »  Volume 48, Issue 8

Magnetic Post-Processing of Additively-Manufactured Inconel 718 Superalloy: Functional Microrelief Evolution and Surface Strain Hardening

D. A. Lesyk$^{1,2,3}$, B. M. Mordyuk$^{3}$, O. Stamann$^{4}$, D. Grochala$^{5}$, S. S. Salii$^{2}$, M. M. Lytvynenko$^{2}$, M. V. Romanenko$^{2}$, M. I. Anyakin$^{2}$, A. Lamikiz$^{1}$

$^{1}$National Technical University of Ukraine ‘Igor Sikorsky Kyiv Polytechnic Institute’, 37 Beresteiskyi Prosp., UA-03056 Kyiv, Ukraine
$^{2}$University of the Basque Country, Barrio de Sarriena, s/n, SP-48940 Leioa, Spain
$^{3}$G. V. Kurdyumov Institute for Metal Physics, N.A.S. of Ukraine, 36 Academician Vernadsky Blvd., UA-03142 Kyiv, Ukraine
$^{4}$Otto-von-Guericke University Magdeburg, 2 Universitätsplatz, DE-39106 Magdeburg, Germany
$^{5}$West Pomeranian University of Technology, 17 al. Piastów, PL-70-310 Szczecin, Poland

Received: 09.07.2026; final version - 08.09.2026. Download: PDF

Nickel-based superalloys with enhanced operational properties are key materials for producing safety-critical components. Additive manufacturing offers a new way to manufacture critical components, enabling the production of superalloy structures with complex shapes, which are unattainable by conventional manufacturing methods. The laser powder bed fusion (LPBF) process is used for manufacturing superalloy components. Post-processing methods are required to improve the surface integrity, because LPBF parts with complex geometries suffer from various defects located both on the surface and near-surface layers. Today, post-processing methods are being developed to improve surface integrity in LPBF-produced parts. In this work, magnetic needle finishing (MNF) is applied for surface post-processing of Inconel 718 superalloy manufactured via LPBF. The effects of magnetic needle finishing under optimised conditions on surface morphology, functional relief performance, microstructure, and hardness are investigated. The results indicate that the surface integrity of the LPBF-manufactured 718 alloy is improved by generating a smoothed surface microrelief with a strain-hardened subsurface layer (the macrohardness increased from ≅ 32 HRC10 to ≅ 39 HRC10) through the high-energy MNF post-processing. Reducing and levelling the amplitude parameters (the Ra parameter is decreased from ≅ 4.0 μm to ≅ 2.0 μm) of microirregularities in the MNF-finished Inconel-alloy samples due to the multiple-angle impact of magnetic pins resulted in a redistribution of surface load, which is favourable for the functional performance of the LPBF-produced parts. A decrease in crystallite size as well as an increase in lattice strain and dislocation density due to the surface plastic deformation of the near-surface layer are confirmed.

Key words: magnetic finishing, Inconel 718, laser powder bed fusion, post-processing, surface integrity, functional relief performance, microstructure.

URL: https://mfint.imp.kiev.ua/en/abstract/v48/i08/0827.html

DOI: https://doi.org/10.15407/mfint.48.08.0827

PACS: 61.72.Ff, 62.20.Qp, 68.35.Ct, 68.70.+w, 81.40.Wx, 81.65.Ps, 83.60.Np

Citation: D. A. Lesyk, B. M. Mordyuk, O. Stamann, D. Grochala, S. S. Salii, M. M. Lytvynenko, M. V. Romanenko, M. I. Anyakin, and A. Lamikiz, Magnetic Post-Processing of Additively-Manufactured Inconel 718 Superalloy: Functional Microrelief Evolution and Surface Strain Hardening, Metallofiz. Noveishie Tekhnol., 48, No. 8: 827–841 (2026)

REFERENCES
  1. G. M. Volpato, U. Tetzlaff, and M. C. Fredel, Addit. Manuf., 55: 102871 (2022).
  2. A. Vafadar, F. Guzzomi, A. Rassau, and K. Hayward, Appl. Sci., 11: 103729 (2021).
  3. K. Li, J. Zhan, Y. Wang, Y. Qin, N. Gong, D. Z. Zhang, S. Tan, L. E. Murr, and Z. Liu, J. Manuf. Process., 133: 285 (2025).
  4. D. A. Lesyk, S. Martinez, A. Lamikiz, O. O. Pedash, and B. N. Mordyuk, Advanced Manufacturing Processes VI. Lect. Notes Mech. Eng. (Eds. V. Tonkonogyi et al.) (Cham: Springer: 2025).
  5. F. Venturi and R. Taylor, J. Mater. Eng. Perform., 32: 6589 (2023).
  6. R. Zhuk, Z. Chen, M. Anyakin, and J. Yao, Int. J. Adv. Manuf. Technol., 108: 1163 (2020).
  7. V. Kovalenko, J. Yao, Q. Zhang, M. Anyakin, X. Hu, and R. Zhuk, Procedia CIRP, 42: 96 (2016).
  8. M. Sokolovskyi, O. Siora, Y. Yurchenko, V. Lukashenko, D. Harder, L. Nyrkova, S. Osadchuk, and A. Bernatskyi, Defect Diffus. Forum, 448: 61 (2026).
  9. P. Gradl, D. C. Tinker, A. Park, O. R. Mireles, M. Garcia, R. Wilkerson, and C. Mckinney, J. Mater. Eng. Perform., 31: 6013 (2022).
  10. D. A. Lesyk, B. N. Mordyuk, S. Martinez, O. O. Pedash, and A. Lamikiz, Advanced Manufacturing Processes VI. Lect. Notes Mech. Eng. (Eds. V. Tonkonogyi et al.) (Cham: Springer: 2026).
  11. T. Thuneman, K. S. Raja, and I. Charit, Crystals, 14: 89 (2024).
  12. D. A. Lesyk, S. Martinez, and A. Lamikiz, Procedia CIRP, 124: 89 (2024).
  13. S. Ozer, M. A. Yalçın, G. M. Bilgin, K. Davut, Z. Esen, and A. F. Dericioglu, J. Alloys Compd., 1012: 178465 (2025).
  14. D. A. Lesyk, S. Martinez, V. V. Dzhemelinskyi, O. Stamann, B. N. Mordyuk, and A. Lamikiz, Advances in Design, Simulation and Manufacturing III. Lect. Notes Mech. Eng. (Eds. V. Ivanov et al.) (Cham: Springer: 2020).
  15. D. A. Lesyk, S. Martinez, B. N. Mordyuk, V. V. Dzhemelinskyi, and A. Lamikiz, Advances in Design, Simulation and Manufacturing VII. Lect. Notes Mech. Eng. (Eds. V. Ivanov et al.) (Cham: Springer: 2024).
  16. D. A. Lesyk, S. Martinez, V. V. Dzhemelinskyi, O. Stamann, B. N. Mordyuk, and A. Lamikiz, Proc. 2020 IEEE 10th Int. Conf. Nanomaterials: Applications & Properties (NAP) (Sumy: 2020), p. 02SAMA17-1.
  17. D. A. Lesyk, A. M. Ralls, B. N. Mordyuk, P. L. Menezes, I. Charit, and A. Lamikiz, New Technologies, Development and Application VIII. Lect. Notes Networks Syst. (Eds. I. Karabegović et al.) (Cham: Springer: 2025), vol. 1482, p. 145.
  18. A. Boschetto, L. Bottini, L. Macera, and F. Veniali, Appl. Sci., 10: 138 (2020).
  19. D. A. Lesyk, B. N. Mordyuk, S. Martinez, V. V. Dzhemelinskyi, D. Grochala, A. V. Kotko, and A. Lamikiz, Coatings, 15, Iss. 4: 425 (2025).
  20. D. A. Lesyk, V. V. Dzhemelinskyi, S. Martinez, D. Grzesiak, and B. N. Mordyuk, Advanced Manufacturing Processes IV. Lect. Notes Mech. Eng. (Eds. V. Tonkonogyi et al.) (Cham: Springer: 2023).
  21. C. S. Bagherifard, N. Beretta, S. Monti, M. Riccio, M. Bandini, and M. Guagliano, Mater. Des., 145: 28 (2018).
  22. D. A. Lesyk, B. N. Mordyuk, S. Martinez, V. V. Dzhemelinskyi, D. Grzesiak, D. Grochala, and A. Lamikiz, Lasers Manuf. Mater. Process., 10: 702 (2023).
  23. L. Beránek, V. Rana, Z. Pitrmuc, S. Pathak, L. Pelikán, Š. Petrášek, L. Hlavůňková, P. Zeman, A. Čermák, J. Kopeček, J. Resl, J. Steklý, O. Gregor, P. Novák, and M. Maštera, J. Mater. Res. Technol., 43: 2672 (2026).
  24. J. A. Banderas-Hernández, C. Rubio-González, and A. Gómez-Ortega, Int. J. Adv. Manuf. Technol., 132: 669 (2024).
  25. H. Soyama, D. Eakins, and A. M. Korsunsky, Int. J. Fatigue, 203: 109342 (2026).
  26. L. Chen, J. Xie, Y. Li, G. Yu, X. Zhang, and X. Ren, J. Mater. Res. Technol., 33: 7668 (2024).
  27. D. A. Lesyk, S. Martinez, B. N. Mordyuk, O. O. Pedash, V. V. Dzhemelinskyi, and A. Lamikiz, Post-Processing Techniques for Additive Manufacturing (Eds. Z. Alam, F. Iqbal, and D. A. Khan) (Boca Raton: Taylor & Francis: 2023).
  28. D. A. Lesyk, B. N. Mordyuk, K. E. Grinkevych, O. O. Pedash, and A. Lamikiz, Advances in Design, Simulation and Manufacturing VIII. Lect. Notes Mech. Eng. (Eds. V. Ivanov et al.) (Cham: Springer: 2025).
  29. D. A. Lesyk, S. Martinez, B. N. Mordyuk, D. Grochala, and A. Lamikiz, New Technologies, Development and Application VII. Lect. Notes Networks Syst. (Eds. I. Karabegović et al.) (Cham: Springer: 2024), vol. 1069, p. 201.
  30. H. Zou, J. Ying, X. Ma, Y. Chen, B. Han, and J. Zhan, Surf. Sci. Technol., 2, No. 17: 46 (2024).
  31. J. Guo, K. H. Au, C.-N. Sun, M. H. Goh, C. W. Kum, K. Liu, J. Wei, H. Suzuki, and R. Kang, J. Mater. Process. Technol., 264: 422 (2019).
  32. M. Marczak, D. A. Moszczynska, and A. P. Wawrzyszcz, Appl. Sci., 15, Iss. 15: 8233 (2025).
  33. Y. Zhao, J. Ratay, K. Li, H. Yamaguchi, and W. Xiong, J. Manuf. Mater. Process., 6, Iss. 2: 43 (2022).
  34. L. Emanuelli, F. Deirmina, and M. Pellizzari, Mater. Charact., 199: 112788 (2023).
  35. W. Tillmann, C. Schaak, J. Nellesen, M. Schaper, M. E. Aydinöz, and K.-P. Hoyer, Addit. Manuf., 13: 93 (2017).
  36. D. A. Lesyk, S. Martinez, O. O. Pedash, V. V. Dzhemelinskyi, and A. Lamikiz, MRS Adv., 7: 197 (2022).
  37. X. Xu, Q. Shen, B. Han, J. Tang, J. Ying, and H. Yang, J. Magn. Magn. Mater., 630: 173458 (2025).
  38. G. Liu, H. Yang, X. Xu, and B. Han, JMMM, 655: 174353 (2026).
  39. Y. Kaynak and E. Tascioglu, Prog. Addit. Manuf., 5: 221 (2020).
  40. M. Ham, S. Park, H. Lee, D. H. Kim, J. H. Sung, G. K. Ahn, G. S. Kim, and B. Lee, J. Manuf. Process., 156A: 569 (2025).
  41. M. Khorasani, A. H. Ghasemi, E. Farabi, M. Leary, I. Gibson, and B. Rolfe, Int. J. Adv. Manuf. Technol., 120: 3471 (2022).

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