A1 Refereed original research article in a scientific journal
Tribocorrosion performance of additively manufactured CuNi30 and SS-316L in marine environment: Seawater resistant alloys
Authors: Anjum, Muhammad Ammar; Nath, Ananya; Goel, Sneha; Mäkilä, Ermei; Sarkar, Sagar; Salminen, Antti; Ganvir, Ashish
Publisher: Elsevier BV
Publication year: 2025
Journal: Journal of Materials Research and Technology
Volume: 39
First page : 7453
Last page: 7468
ISSN: 2238-7854
eISSN: 2214-0697
DOI: https://doi.org/10.1016/j.jmrt.2025.10.247
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Open Access publication channel
Web address : https://doi.org/10.1016/j.jmrt.2025.10.247
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/505593677
This study presents the first systematic investigation of the tribocorrosion resistance of additively manufactured CuNi30 in artificial seawater (ASTM D1141-98), along with mechanical and tribocorrosion performance comparison against SS-316L. Both alloys were produced by laser powder bed fusion (PBF-LB/M), achieving relative densities of 99.8 % (CuNi30) and 99.1 % (SS-316L). The as-built CuNi30 exhibited a tensile strength of 503 MPa, which increased to 638 MPa after heat treatment at 550 °C for 2 h, reaching parity with SS-316L. Phase identification through X-ray diffraction confirmed the precipitation of Nb-rich precipitates (NbNi3) after heat treatment which contributed to the observed strengthening. The tribocorrosion performance was evaluated using a ball-on-disk setup, where potentiostatic, potentiodynamic, EIS, and COF measurements were recorded under both static and sliding conditions to assess corrosion-wear interactions. The results revelated that SS-316L is more susceptible to tribocorrosion damage due to its lower polarization stability and the formation of thin unstable third body layer. The calculated wear rate showed a decrease from 9.07 × 10−8 mm3/N·mm for SS-316L to 2.08 × 10−8 mm3/N·mm for heat-treated CuNi30, highlighting the superior tribocorrosion resistance of CuNi30.
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The authors also gratefully acknowledge the financial support provided by Neles Oy Foundation and AIMM project funded by FICORE network (University of Turku Seed Funding). Prof. Ashish Ganvir acknowledges financial support from GREEN-BAT (352517), co-funded by the Research Council of Finland and the European Union under the M-ERA.NET 2021 framework, as well as the SOLACE (DNR 360540) Academy research fellowship, funded by the Research Council of Finland. He also extends his gratitude to the City of Turku for supporting his tenure-track grant. Prof. Antti Salminen acknowledges financial support through the DREAMS TENK TOT project (5159/31/2021), funded by Business Finland.
