Experimental investigation of the effects of aging and cryogenic treatments on the mechanical properties of superelastic nickel-titanium shape-memory alloys

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dc.authoridALTIN KARATAS, MELTEM/0000-0002-1628-1316
dc.authoridAkinay, Yuksel/0000-0002-6171-6307
dc.authoridGuven, Sedat/0000-0001-8891-5421
dc.contributor.authorGuven, Sedat
dc.contributor.authorAltin Karatas, Meltem
dc.contributor.authorGokkaya, Hasan
dc.contributor.authorAkinay, Yuksel
dc.date.accessioned2024-09-29T16:05:01Z
dc.date.available2024-09-29T16:05:01Z
dc.date.issued2022
dc.departmentKarabük Üniversitesien_US
dc.description.abstractIn this study, electropolishing and two different heat treatments were applied to wires made of superelastic nickel-titanium (NiTi) shape-memory alloy (SMA) and their mechanical properties and stress-induced deformations were investigated. In experimental studies, cryogenic and aging heat treatments were applied to NiTi SMA wire samples and tensile test experiments were carried out to determine the effect of the heat treatments on their mechanical properties. Following the tensile test experiments conducted at room temperature (23 degrees C), the study investigated changes in the elemental composition, fracture modes, micro cracks, and phase structures and in the mechanical properties formed in the fracture region. Intermetallic phase structures (Ti2Ni, Ni3Ti, and Ni4Ti3) were observed in the X-ray diffraction (XRD) analyses. It was concluded that the aging heat treatment had directly affected the reduction in hardness. In particular, in samples without the aging heat treatment, a stress-induced decrease in the Ni and Ti ratios and an increase in the carbon (C) ratio were observed in the chemical composition of the fracture surface of the superelastic NiTi SMA wires. It was determined that the changes in the chemical composition caused by stress had affected the mechanical properties negatively. In the fractography of the NiTi SMA wires, the samples exhibited mostly ductile fracture behavior with small dimples.en_US
dc.description.sponsorshipKarabuk Universityen_US
dc.description.sponsorshipThe author(s) disclosed receipt of the following financial support for the research, authorship, and/or publication of this article: The authors have received research grants from Karabuk University.en_US
dc.identifier.doi10.1177/09544062211069864
dc.identifier.endpage6759en_US
dc.identifier.issn0954-4062
dc.identifier.issn2041-2983
dc.identifier.issue12en_US
dc.identifier.scopus2-s2.0-85125095100en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage6752en_US
dc.identifier.urihttps://doi.org/10.1177/09544062211069864
dc.identifier.urihttps://hdl.handle.net/20.500.14619/6451
dc.identifier.volume236en_US
dc.identifier.wosWOS:000759218500001en_US
dc.identifier.wosqualityQ3en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherSage Publications Ltden_US
dc.relation.ispartofProceedings of the Institution of Mechanical Engineers Part C-Journal of Mechanical Engineering Scienceen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectSmart materialsen_US
dc.subjectshape-memory alloysen_US
dc.subjectmechanical propertiesen_US
dc.subjectcryogenic treatmenten_US
dc.subjectagingen_US
dc.titleExperimental investigation of the effects of aging and cryogenic treatments on the mechanical properties of superelastic nickel-titanium shape-memory alloysen_US
dc.typeArticleen_US

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