Microstructure and transformation related behaviors of a Ni45.3Ti29.7Hf20Cu5 high temperature shape memory alloy

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dc.contributor.authorKaraca, H. E.
dc.contributor.authorAcar, E.
dc.contributor.authorDed, G. S.
dc.contributor.authorSaghaian, S. M.
dc.contributor.authorBasaran, B.
dc.contributor.authorTobe, H.
dc.contributor.authorChumlyakov, Yi.
dc.date.accessioned2026-08-12T17:48:24Z
dc.date.issued2015
dc.departmentFırat Üniversitesi
dc.description.abstractEffects of heat treatment temperature and time on the microstructure and shape memory behaviors (e.g. transformation temperatures, load-biased shape memory effect, superelasticity, two-way shape memory effect, and related properties) were investigated in a Ni45.3Ti29.7Hf20Cu5 (at%) high temperature polycrystalline shape memory alloy. Heat treatments could be used to control the Us and to a lesser extent recoverable and irrecoverable strains. The Ni45.3Ti29.7Hf20Cu5 alloy was capable of recovering shape memory strains of up to 2% at temperatures above 100 degrees C under high compressive stresses (700 MPa) and up to 0.8% TWSME strain was possible after a non-intense stress-cycling training process. However, due to high Clausius-Clapeyron slopes, large temperature hysteresis, and a strong dependence of transformation stress on temperature, fully recoverable superelastic behavior was not observed because plastic deformation occurred concurrently with the stress-induced martensitic transformation. (C) 2015 Elsevier B.V. All rights reserved.
dc.description.sponsorshipNASA Fundamental Aeronautics Program; Aeronautical Sciences and Transformational Tools & Technologies Projects (Technical Discipline Lead Dale Hopkins); NASA EPSCOR program [NNX11AQ31A]; NASA Kentucky Space Grant Consortium [516171-10-165]; RSF Grant [14-29-00012]; Deutsche Forschungsgemeinschaft [FOR 1766]; Russian Science Foundation [14-29-00012] Funding Source: Russian Science Foundation
dc.description.sponsorshipThis work was supported in part by the NASA Fundamental Aeronautics Program, and Aeronautical Sciences and Transformational Tools & Technologies Projects (Technical Discipline Lead Dale Hopkins), the NASA EPSCOR program under Grant NNX11AQ31A, the NASA Kentucky Space Grant Consortium 516171-10-165 and RSF Grant 14-29-00012. HIM acknowledges financial support from Deutsche Forschungsgemeinschaft (FOR 1766).
dc.identifier.doi10.1016/j.msea.2014.12.111
dc.identifier.endpage94
dc.identifier.issn0921-5093
dc.identifier.issn1873-4936
dc.identifier.orcid0000-0003-2119-824X
dc.identifier.orcid0000-0001-7404-4311
dc.identifier.orcid0000-0001-8171-8863
dc.identifier.scopus2-s2.0-84921315865
dc.identifier.scopusqualityQ1
dc.identifier.startpage82
dc.identifier.urihttps://doi.org/10.1016/j.msea.2014.12.111
dc.identifier.urihttps://hdl.handle.net/11508/61416
dc.identifier.volume627
dc.identifier.wosWOS:000350779600012
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Science Sa
dc.relation.ispartofMaterials Science and Engineering A-Structural Materials Properties Microstructure and Processing
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20260511
dc.subjectNiTiHfCu alloys
dc.subjectPhase transformation
dc.subjectTWSME
dc.subjectShape memory effect
dc.subjectShape memory alloys
dc.titleMicrostructure and transformation related behaviors of a Ni45.3Ti29.7Hf20Cu5 high temperature shape memory alloy
dc.typeArticle

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