Extrusion of three-layer composite hexagonal clad rods
| Autor: | Chih-Wei Wu, Ray-Quan Hsu |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
business.product_category Metallurgy Composite number Alloy Metals and Alloys Niobium chemistry.chemical_element Deformation (meteorology) engineering.material Industrial and Manufacturing Engineering Rod Computer Science Applications Diffusion layer chemistry Modeling and Simulation Ceramics and Composites engineering Die (manufacturing) Extrusion Composite material business |
| Zdroj: | Journal of Materials Processing Technology. 123:47-53 |
| ISSN: | 0924-0136 |
| DOI: | 10.1016/s0924-0136(02)00036-5 |
| Popis: | Composite clad rods consisting of three different materials are applied extensively as conductors, electrodes and chemical devices. Commercial applications involving low temperature niobium–tin alloy (Nb 3 Sn) superconductor rods, which have a pure niobium (Nb) core, a copper–tin (Cu–Sn) alloy outer sleeve and a Nb 3 Sn 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. |
| Databáze: | OpenAIRE |
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