Author : Csaba Nagy
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (16 download)
Book Synopsis Modélisation Numérique Multiphysique Et Multi-échelles de la Solidification Des Alliages Sous la Convection Forcée by : Csaba Nagy
Download or read book Modélisation Numérique Multiphysique Et Multi-échelles de la Solidification Des Alliages Sous la Convection Forcée written by Csaba Nagy and published by . This book was released on 2018 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aluminium and aluminium-based alloys are widely in industry due to the corrosion passivity, lighter weight, yet - in several cases - comparable strength with steel. Often, the material is used “as-cast“, that means that composition, macro- and microstructure of the material emerged during the casting defines its behaviour under different loads. Yet, convective flows generally arise in casting processes performed on-ground because of gravity and modify local solidification conditions, and, consequently, solute distribution and affect properties of material. To understand and to be able to control such phenomena, detailed experimental and numerical work has been needed.Two Bridgman-type furnaces were constructed in the University of Miskolc, Hungary, by MTA-ME Materials Science Research Group in the framework of the ESA funded MICAST project for experimental study of the effect of convective flow in solidification of alloys. These facilities were equipped with electromagnetic systems capable to generate rotating and travelling magnetic fields of various intensities.Multiphase models developed at SIMaP/EPM, Grenoble, France, were applied for numerical study of the solidification of binary and ternary aluminium alloys under electromagnetically generated convective flow. Solidification of a binary Al-Si alloy under RMF stirring was done with Euler-Euler ensemble averaging and lever rule mesoscale models coupled with the macroscale transport both in 2D and 3D geometries. Further, effect of various modes of TMF stirring during solidification of a ternary alloys was studied in 3D geometry with lever rule based macroscopic model. Results of numerical simulations well explain the segregation observed in the experimental samples.
