Microstructural characterization, boriding kinetics and tribo-wear behavior of borided Fe-based A286 superalloy

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dc.authoridgunen, ali/0000-0002-4101-9520
dc.authoridcetin, Melik/0000-0002-6952-2523
dc.authoridKeddam, Mourad/0000-0002-7721-5830
dc.authoridAlkan, Sabri/0000-0002-1052-4778
dc.contributor.authorGunen, Ali
dc.contributor.authorKeddam, Mourad
dc.contributor.authorAlkan, Sabri
dc.contributor.authorErdogan, Azmi
dc.contributor.authorCetin, Melik
dc.date.accessioned2024-09-29T15:57:51Z
dc.date.available2024-09-29T15:57:51Z
dc.date.issued2022
dc.departmentKarabük Üniversitesien_US
dc.description.abstractIron-based superalloys are alloys produced for use in corrosive environments as an alternative to high-cost nickel-based superalloys. However, their average strength and hardness, attributed to their austenitic structures, limit their use in tribological applications. In an attempt to counter these drawbacks, boriding was applied to an iron-based A286 superalloy having an initial surface hardness of 320 HV. Boriding kinetics, some mechanical properties, and tribo-wear (ambient air and 3.5 NaCl environment) behaviors of the formed boride layers were investigated. Multicomponent boride layers (consist of FeB, Fe2B, CrB, NiB, Ni4B3) were formed on the surface of the alloy, with hardness and thickness values of 1498-1961 HV and 20-130 mu m, respectively, depending on the boriding temperature and the treatment time. The integral diffusion model was adopted to deal with the kinetics of monoboride and hemiboride layers formed on the surface. The boron activation energies of FeB, Fe2B, and DZ layer were estimated as equal to 175.86, 198.7, and 205.73 kJ mol- 1, respectively. As a result of increased surface hardness, all of the borided samples displayed reduced friction coefficients and higher wear resistance compared to the untreated alloy, in both ambient air and 3.5% NaCl. However, the increase in wear resistance was not proportional to the increase in hardness; while the best wear resistance was obtained in samples borided at 850-950 degrees C for 6 h, the lowest wear resistance was obtained in samples borided for 4-6 h at 1050 degrees C. This situation was caused by the Kirkendall effect and residual stresses in the structure of alloying elements with different diffusion rates due to the high-temperature effect of the boriding process.en_US
dc.identifier.doi10.1016/j.matchar.2022.111778
dc.identifier.issn1044-5803
dc.identifier.issn1873-4189
dc.identifier.scopus2-s2.0-85124384925en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1016/j.matchar.2022.111778
dc.identifier.urihttps://hdl.handle.net/20.500.14619/5031
dc.identifier.volume186en_US
dc.identifier.wosWOS:000808795900002en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Science Incen_US
dc.relation.ispartofMaterials Characterizationen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectSuperalloyen_US
dc.subjectHardfacingen_US
dc.subjectCharacterizationen_US
dc.subjectFrictionen_US
dc.subjectWearen_US
dc.subjectBoriding kineticen_US
dc.titleMicrostructural characterization, boriding kinetics and tribo-wear behavior of borided Fe-based A286 superalloyen_US
dc.typeArticleen_US

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