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dc.contributor.authorAhmed, Alauddinen
dc.contributor.authorAlexandrou, Andreas N.en
dc.coverage.spatialNew York, NY, United Statesen
dc.creatorAhmed, Alauddinen
dc.creatorAlexandrou, Andreas N.en
dc.description.abstractRecently the importance of processing metals and metal matrix composites in semi-solid state is growing rapidly. Performing the shape making operations in the semi-solid state provides a better opportunity to control the microstructure of the final product. In this paper we are presenting a numerical approach to simulate the compression molding of semi-solid materials. A phenomenological constitutive relation based on the Bingham fluid model and the Power-law model is proposed. The model has four adjustable parameters. These parameters are evaluated by comparing with the experimental results. Results are presented for Sn-15%Pb alloy system. The model is then used to describe the unsteady flow of semi-solid materials in compression molding. The Generalized Eulerian-Lagrangian (GEL) formulation is used to locate the free surface while maintaining the solid boundaries. Yielded and unyielded portions of the charge are identified.en
dc.publisherPubl by ASMEen
dc.sourceAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDen
dc.subjectMathematical modelsen
dc.subjectNumerical methodsen
dc.subjectUnsteady flowen
dc.subjectCompression moldingen
dc.subjectBingham fluid modelen
dc.subjectSemi solid materialsen
dc.subjectAdjustable parametersen
dc.subjectFree surfacesen
dc.subjectGeneralized Eulerian Lagrangian modelen
dc.subjectLead alloysen
dc.subjectLiquid metalsen
dc.subjectMetal moldingen
dc.subjectMetallic matrix compositesen
dc.subjectMetallographic microstructureen
dc.subjectMicrostructure controlen
dc.subjectNon Newtonian flowen
dc.subjectPhenomenological constitutive equationen
dc.subjectPower law modelen
dc.subjectShear thickening Bingham fluidsen
dc.subjectTin alloysen
dc.subjectTin lead alloysen
dc.titleProcessing of semi-solid materials using a shear-thickening Bingham fluid modelen
dc.description.endingpage87Πολυτεχνική Σχολή / Faculty of EngineeringΤμήμα Μηχανικών Μηχανολογίας και Κατασκευαστικής / Department of Mechanical and Manufacturing Engineering
dc.type.uhtypeConference Objecten

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