Characteristics, high temperature wear and oxidation behavior of boride layer grown on nimonic 80A Ni-based superalloy

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dc.authoridDoleker, Kadir Mert/0000-0003-4057-6832
dc.authoridKORKMAZ, Mehmet Erdi/0000-0002-0481-6002
dc.authoridgunen, ali/0000-0002-4101-9520
dc.contributor.authorGunen, Ali
dc.contributor.authorDoleker, Kadir Mert
dc.contributor.authorKorkmaz, Mehmet Erdi
dc.contributor.authorGok, Mustafa Sabri
dc.contributor.authorErdogan, Azmi
dc.date.accessioned2024-09-29T16:00:47Z
dc.date.available2024-09-29T16:00:47Z
dc.date.issued2021
dc.departmentKarabük Üniversitesien_US
dc.description.abstractNickel-based superalloy Nimonic 80A was pack-borided in a solid medium at temperatures of 850 degrees C and 950 degrees C for 2 h and 4 h using silicon-free boriding powders. To investigate the effects of the boriding treatments on mechanical properties (hardness, modulus of elasticity, fracture toughness) and high temperature oxidation resistance, the layers grown on the surfaces were characterized using optical and scanning electron microscopy, energy dispersive spectroscopy, and X-ray diffractometry, and evaluated using microhardness, nanoindentation, wear and oxidation tests. Wear tests were performed on untreated and borided Nimonic 80A alloys using a ball-on-disc tribometer at room temperature and at 500 degrees C under dry sliding conditions. Oxidation tests were carried out in air at 1000 degrees C for 5 h, 25 h and 75 h. Characterization studies revealed a smooth, 22 to 86 mu m thick crack-free boride layer consisting mainly of Ni2B and minor quantities of CrB, Cr2B and Cr5B3 in the borided samples. The hardness and elastic modulus of the boride layer was measured as 15.57-18.95 GPa and 142-217 GPa, respectively. Increasing the boriding temperature and time increased the concentrations of chromium in the boride layer. The hardness and elastic modulus of the boride layer increased with chromium content while its fracture toughness decreased. The boriding treatments improved the dry sliding wear resistance. Increasing boriding time and temperature generally led to a higher wear resistance values. However, the treatments had no significant effect on oxidation resistance. The results of this study show that boriding can significantly improve the wear resistance of Nimonic 80A without compromising its oxidation resistance.en_US
dc.identifier.doi10.1016/j.surfcoat.2021.126906
dc.identifier.issn0257-8972
dc.identifier.issn1879-3347
dc.identifier.scopus2-s2.0-85100279527en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.surfcoat.2021.126906
dc.identifier.urihttps://hdl.handle.net/20.500.14619/5353
dc.identifier.volume409en_US
dc.identifier.wosWOS:000654045600065en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Saen_US
dc.relation.ispartofSurface & Coatings Technologyen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectNi based Superalloyen_US
dc.subjectBoridingen_US
dc.subjectMechanical propertiesen_US
dc.subjectHigh temperatureen_US
dc.subjectWearen_US
dc.subjectOxidationen_US
dc.titleCharacteristics, high temperature wear and oxidation behavior of boride layer grown on nimonic 80A Ni-based superalloyen_US
dc.typeArticleen_US

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