Nitriding of CoCrFeNi medium entropy alloys: Characterization and tribocorrosion behaviour

The microstructure and formation mechanism of a plasma-nitrided medium-entropy CoCrFeNi alloy, which was produced via arc melting, were examined, along with the tribocorrosion behaviour of both the unterated and the nitrided alloy. The presence of CrN and expanded FCC in the nitrided alloy was clear...

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Bibliographic Details
Published in:Surface & coatings technology 2024-03, Vol.479, p.130525, Article 130525
Main Authors: Cengiz, Sezgin, Ceylan, Doğancan, Devecili, Ahmet Oktay, Gencer, Yucel, Tarakci, Mehmet
Format: Article
Language:English
Subjects:
Abrasive wear
Adhesion
Medium entropy alloy
Nitriding
Tribocorrosion
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Summary:The microstructure and formation mechanism of a plasma-nitrided medium-entropy CoCrFeNi alloy, which was produced via arc melting, were examined, along with the tribocorrosion behaviour of both the unterated and the nitrided alloy. The presence of CrN and expanded FCC in the nitrided alloy was clearly observed. The nitride layer exhibited an approximate thickness of 27 μm (±5.3 μm). Tribocorrosion results conclusively demonstrated that the nitrided alloy displayed a superior resistance to both corrosion and erosion when compared to the untreated alloy. The findings from Rockwell indentation tests confirmed that the adhesion between the nitride layer and the substrate was notably strong. •Plasma nitriding improve the tribocorrosion behaviour of CoCrFeNi alloy.•Effect of nitriding on microstructure and tribocorrosion properties were illustrated.•An attempt was made to understand the plasma nitriding behaviour of CoCrFeNi MEA.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2024.130525