| Title: | Effects of boriding and niobium carbide coating on the microstructure, hardness, and tribocorrosion properties of Vanadis 6 tool steel |
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| Authors: | ID Yarasu, Venu (Author)
ID Podgornik, Bojan (Author)
ID Kosec, Tadeja (Author)
ID Jurči, Peter (Author)
ID Günen, Ali (Author)
ID Orihel, Peter (Author)
ID Alkan, Sabri (Author) |
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| Files: |  PDF - Presentation file, download (17,92 MB)
MD5: 918802169D8733889BDDCA5EB938088C
 URL - Source URL, visit https://www.sciencedirect.com/science/article/pii/S266684592600142X
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  IMT - Institute of Metals and Technology
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| Abstract: | Vanadis 6 (V6) cold work tool steel is widely used in cold forming applications due to its high wear resistance and toughness. However, tribocorrosion remains a major challenge in aggressive manufacturing conditions limiting the tool life. This study investigates the effect of boride and niobium (NbC) coatings on the microstructure, hardness, and tribocorrosion properties of V6 tool steel. Both uncoated and coated samples were tested in 0.1 M NaCl (pH 7), 0.001 M NaOH (pH 11), and Na-tetraborate (pH 10) solutions. The microstructural changes and phase analysis were examined via a scanning electron microscope coupled with energy-dispersive spectroscopy (SEM-EDS) and X-ray diffraction, while the hardness was evaluated using Vickers microhardness (HV). The tribocorrosion tests were performed by monitoring the open circuit potential (OCP) with a reciprocating pin-on-disk configuration. Wear surface analysis was conducted using 3D confocal microscopy, Raman spectroscopy, and SEM-EDS techniques. The findings indicated that the application of coatings enhanced the surface hardness from 710 HV30 to 2000 HV0.1 and 1550 HV0.1 for boride and NbC coatings, respectively. During the tribocorrosion experiments, the samples coated with NbC and borides consistently displayed the highest open-circuit potential (OCP) in all the solutions. These results confirm that both NbC and borides improved the tribological and corrosion resistance of Vanadis 6 steel, with the NbC coating offering a more effective and stable protective layer. The outcome of this study emphasizes the critical role of coatings and the appropriate choice of electrolytes for comparative evaluation in the tribocorrosion behavior of cold work tool steels. |
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| Keywords: | Vanadis 6 steel, surface modifications, microstructure, ribocorrosion |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publication date: | 24.05.2026 |
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| Publisher: | Elsevier |
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| Year of publishing: | 2026 |
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| Number of pages: | str. 1-15 |
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| Numbering: | Vol. 24, [article no.] 100850 |
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| Source: | Results in Surfaces and Interfaces |
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| PID: | 20.500.12556/DiRROS-29988  |
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| UDC: | 544.5/.6 |
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| ISSN on article: | 2666-8459 |
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| DOI: | 10.1016/j.rsurfi.2026.100850 |
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| COBISS.SI-ID: | 279781891 |
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| Copyright: | © 2026 The Authors |
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| Note: | Nasl. z nasl. zaslona;
Opis vira z dne 29. 5. 2026;
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| Publication date in DiRROS: | 11.06.2026 |
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| Views: | 49 |
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| Downloads: | 42 |
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