Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.11851/1036
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dc.contributor.authorAkyıldız, Öncü-
dc.contributor.authorÖren, Ersin Emre-
dc.contributor.authorOğurtanı, Tarık Ömer-
dc.date.accessioned2019-05-23T05:48:45Z
dc.date.available2019-05-23T05:48:45Z
dc.date.issued2012
dc.identifier.citationAkyildiz, O., Oren, E. E., & Ogurtani, T. O. (2012). Grain boundary grooving in bi-crystal thin films induced by surface drift-diffusion driven by capillary forces and applied uniaxial tensile stresses. Philosophical Magazine, 92(7), 804-829.en_US
dc.identifier.issn1478-6435
dc.identifier.othernumber of pages 26
dc.identifier.urihttps://doi.org/10.1080/14786435.2011.634850-
dc.identifier.urihttps://hdl.handle.net/20.500.11851/1036-
dc.description.abstractGrain boundary (GB) grooving, induced by surface drift-diffusion and driven by the combined actions of capillary forces and applied uniaxial tensile stresses, is investigated in bi-crystal thin films using self-consistent dynamical computer simulations. A physico-mathematical model, based on the irreversible thermodynamics treatment of surfaces and interfaces with singularities allowed auto-control of the otherwise free-motion of the triple junction at the intersection of the grooving surface and the GB, without having any a priori assumption on the equilibrium dihedral angles. In the present theory, the generalised driving forces for stress-induced surface drift-diffusion arise not only from the usual elastic strain energy density (ESED), but also much stronger elastic dipole tensor interactions (EDTI) between the applied stress field and the mobile atomic species situated at the surface layer and in the GB regions. Accelerated groove-deepening kinetics shows that the surface drift-diffusion enhanced by the applied uniaxial tensile stresses through EDTI is dominant over the GB flux leakage at the triple junction. At high uniaxial stress levels (>= 500MPa for a 100-nm thick copper film), a sequential time-frame for micro-crack nucleation and growth is recorded just before specimen failure took place. These non-equilibrium thermokinetics discoveries (kinetics and energetics) contradict or at least do not support the hypothesis of the steady-state diffusive GB micro-crack formation and propagation due to 'constant' flux drainage through GB enhanced by tensile stresses acting normal to it.en_US
dc.language.isoenen_US
dc.publisherTaylor & Francis Ltden_US
dc.relation.ispartofPhilosophical Magazineen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectnon-equilibrium phenomenaen_US
dc.subjectsurface thermodynamicsen_US
dc.subjectdiffusionen_US
dc.subjectthin-film mechanicsen_US
dc.subjectnumerical modellingen_US
dc.subjectshape evolutionen_US
dc.subjectgrain boundary interfacesen_US
dc.subjectsurfacesen_US
dc.titleGrain Boundary Grooving in Bi-Crystal Thin Films Induced by Surface Drift-Diffusion Driven by Capillary Forces and Applied Uniaxial Tensile Stressesen_US
dc.typeArticleen_US
dc.departmentFaculties, Faculty of Engineering, Department of Biomedical Engineeringen_US
dc.departmentFakülteler, Mühendislik Fakültesi, Biyomedikal Mühendisliği Bölümütr_TR
dc.identifier.volume92
dc.identifier.issue7
dc.identifier.startpage804
dc.identifier.endpage829
dc.relation.tubitakTurkish Scientific and Technological Research Council, TUBITAK [107M011]en_US
dc.authorid0000-0001-5902-083X-
dc.identifier.wosWOS:000302465700003en_US
dc.identifier.scopus2-s2.0-84858022997en_US
dc.institutionauthorÖren, Ersin Emre-
dc.identifier.doi10.1080/14786435.2011.634850-
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.identifier.scopusqualityQ1-
item.openairetypeArticle-
item.languageiso639-1en-
item.grantfulltextnone-
item.fulltextNo Fulltext-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
crisitem.author.dept02.2. Department of Biomedical Engineering-
Appears in Collections:Biyomedikal Mühendisliği Bölümü / Department of Biomedical Engineering
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection
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