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dc.contributor.authorAureli, M.en
dc.contributor.authorDoumanidis, C. C.en
dc.contributor.authorGunduz, I. E.en
dc.contributor.authorHussien, A. G. S.en
dc.contributor.authorLiao, Y.en
dc.contributor.authorJaffar, S. M.en
dc.contributor.authorRebholz, Clausen
dc.contributor.authorDoumanidis, C. C.en
dc.creatorAureli, M.en
dc.creatorDoumanidis, C. C.en
dc.creatorGunduz, I. E.en
dc.creatorHussien, A. G. S.en
dc.creatorLiao, Y.en
dc.creatorJaffar, S. M.en
dc.creatorRebholz, Clausen
dc.creatorDoumanidis, C. C.en
dc.description.abstractNanostructured bimetallic reactive multilayers can be conveniently produced by ball milling of elemental powders. This research explores the non-equilibrium microscale conductive thermal transport in ball-milled particulate fractal structures during fabrication, arising from heat dissipation by bulk plastic deformation and surface friction. Upon impactor collisions, temperature increments are determined at interface joints and domain volumes using Green's functions, mirrored by source images with respect to warped ellipsoid domain boundaries. Heat source efficiency is calibrated via laboratory data to compensate for thermal expansion and impactor inelasticity, and the thermal analysis is coupled to a dynamic mechanics model of the particulate fracture. This thermomechanical model shows good agreement with the fractal dimensions of the observed microstructure from ball milling experiments. The model is intended to provide a comprehensive physical understanding of the fundamental process mechanism. In addition, the model could serve as a real-time thermal observer for closed-loop process control, as well as for interfacial diffusion and reaction analysis during ball milling. © 2017 Author(s).en
dc.sourceJournal of Applied Physicsen
dc.subjectThermal expansionen
dc.subjectBall millingen
dc.subjectElemental powdersen
dc.subjectFractal dimensionen
dc.subjectFractal structuresen
dc.subjectInterfacial diffusionen
dc.subjectMechanics modelingen
dc.subjectMilling (machining)en
dc.subjectProcess mechanismsen
dc.subjectTemperature incrementen
dc.subjectThermal transporten
dc.subjectThermomechanical modelen
dc.titleNon-equilibrium microscale thermomechanical modeling of bimetallic particulate fractal structures during ball milling fabricationen
dc.description.volume122Πολυτεχνική Σχολή / Faculty of EngineeringΤμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering

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