Comparative study of heat treatment routes for enhancing high-temperature wear resistance of EBM-processed Inconel 718

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dc.contributor.authorKarakaş, Mustafa Serdar
dc.contributor.authorGünen, Ali
dc.contributor.authorLindner, T.
dc.contributor.authorKüçük, Y.
dc.contributor.authorKon, Ö.
dc.contributor.authorJoshi, S.
dc.contributor.authorÇam, Gürel
dc.contributor.authorLampke, Thomas
dc.date.accessioned2025-10-03T12:27:32Z
dc.date.available2025-10-03T12:27:32Z
dc.date.issued2025
dc.departmentFakülteler, Mühendislik Fakültesi, Metalurji ve Malzeme Mühendisliği Bölümü
dc.description.abstractAdditive manufacturing of nickel-based superalloys such as Inconel 718 via electron beam melting (EBM) has gained increasing attention for aerospace applications; however, challenges related to surface hardness and high-temperature wear resistance remain, highlighting the need for systematic post-processing strategies. In this study, the effects of several post-processing heat treatments—solutionizing, solutionizing + aging, boronizing, and boronizing + aging—on the microstructure and high temperature wear behavior applied of electron beam melting (EBM) additive-manufactured Inconel 718 were investigated. The materials were characterized using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), microhardness measurements, and high-temperature wear tests. The results showed that solutionizing and solutionizing + aging produced a more homogeneous structure compared to the as-built condition, while boronizing and boronizing + aging significantly increased the surface hardness, leading to a notable improvement in high-temperature wear resistance. The wear resistance followed the order: boronizing, boronizing + aging, solutionizing + aging, solutionizing, and as-built condition. The improvement in wear resistance through aging after solutionizing was attributed to the microstructural refinement involving the formation of γ' and γ'' precipitates and carbides, which improved the strength and wear resistance. However, aging after boronizing weakened the hard boride layer due to coarsening and localized diffusion of boron into the core. Hardness played a crucial role in the effective wear mechanism: abrasive wear was prevalent in the as-built, solutionized, and solutionized + aged specimens, whereas microcracking was a significant mechanism in the boronized and boronized + aged specimens. With increased wear test temperature, oxidative wear and adhesive transfer became more pronounced, regardless of the post-processing treatment.
dc.description.sponsorshipSwedish Governmental Agency
dc.identifier.doi10.1016/j.mtcomm.2025.113864
dc.identifier.issn2352-4928
dc.identifier.scopus2-s2.0-105016886579
dc.identifier.urihttps://doi.org/10.1016/j.mtcomm.2025.113864
dc.identifier.urihttps://hdl.handle.net/11501/2387
dc.identifier.volume49
dc.identifier.wosWOS:001586745200005
dc.identifier.wosWOS:001586745200005
dc.identifier.wosqualityQ2
dc.indekslendigikaynakScopus
dc.indekslendigikaynakWeb of Science
dc.institutionauthorÇam, Gürel
dc.language.isoen
dc.publisherElsevier Ltd
dc.relation.ispartofMaterials Today Communications
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectAdditive Manufacturing
dc.subjectElectron Beam Melting
dc.subjectHigh Temperature Wear
dc.subjectNickel-Base Superalloy
dc.subjectPost-Processing
dc.titleComparative study of heat treatment routes for enhancing high-temperature wear resistance of EBM-processed Inconel 718
dc.typeArticle

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