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dc.contributor.authorWu, CWen_US
dc.contributor.authorHsu, RQen_US
dc.date.accessioned2014-12-08T15:42:30Z-
dc.date.available2014-12-08T15:42:30Z-
dc.date.issued2002-04-10en_US
dc.identifier.issn0924-0136en_US
dc.identifier.urihttp://dx.doi.org/10.1016/S0924-0136(02)00036-5en_US
dc.identifier.urihttp://hdl.handle.net/11536/28862-
dc.description.abstractComposite clad rods consisting of three different materials are applied extensively as conductors, electrodes and chemical devices. Commercial applications involving low temperature niobium-tin alloy (Nb3Sn) superconductor rods, which have a pure niobium (Nb) core, a copper-tin (Cu-Sn) alloy outer sleeve and a Nb3Sn diffusion layer in between, stipulate these conductors as, electrodes that are intended for processing as rods of various shapes. During the extrusion process, non-homogeneous deformation tends to occur because the billet consists of materials with different mechanical properties. In this study, the authors present a numerical simulation model based on the upper-bound theorem to analyze three-layer composite clad rods with a hexagonal cross-section under extrusion. A velocity field is also generated with the assistance of a product's cross-section profile functions. The velocity component in the extrusion axis is expressed as a convex distribution. Analytical results indicate that various process variables such as the semi-die angle, reduction of area, friction condition of the die and combinations of the three constituent materials, prominently influence the extrusion process. Moreover, the extrusion pressure, product dimension-change and the probability of sound extrusion are related closely to the process variables. (C) 2002 Elsevier Science B.V. All rights reserved.en_US
dc.language.isoen_USen_US
dc.subjectcomposite clad rodsen_US
dc.subjectniobium-tin alloyen_US
dc.subjectcopper-tin alloyen_US
dc.titleExtrusion of three-layer composite hexagonal clad rodsen_US
dc.typeArticleen_US
dc.identifier.doi10.1016/S0924-0136(02)00036-5en_US
dc.identifier.journalJOURNAL OF MATERIALS PROCESSING TECHNOLOGYen_US
dc.citation.volume123en_US
dc.citation.issue1en_US
dc.citation.spage47en_US
dc.citation.epage53en_US
dc.contributor.department機械工程學系zh_TW
dc.contributor.departmentDepartment of Mechanical Engineeringen_US
dc.identifier.wosnumberWOS:000175343700009-
dc.citation.woscount5-
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