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Modeling the reverse segregation of reinforcements in functionally graded composites by the longitudinal casting method

by Joo Oliveira Cardoso

Institution:	Universidade Nova
Year:	2017
Keywords:	Functionally graded materials; Longitudinal centrifugal casting; finite difference method; Domnio/rea Cientfica::Engenharia e Tecnologia::Engenharia dos Materiais
Posted:	02/01/2018
Record ID:	2180815
Full text PDF:	http://www.rcaap.pt/detail.jsp?id=oai:run.unl.pt:10362/21538

Abstract

In this dissertation, we simulate the production of an Al/SiC functionally graded metal ma-trix composite, made using the process of longitudinal centrifugal casting. This specific method-ology allows the production of geometries that arent possible with other variants of the centrifu-gal casting method, making it highly desirable; however, the longitudinal variant has not attracted a wide attention in the literature, namely in regards to the phenomena of reverse, dimensional and transverse segregation.A MATLAB code was developed to study the effects of reverse segregation; a fixed grid finite difference method was used for this which resulted in the study of the relation between starting casting temperatures and final particle distributions. An additional simulation was made considering a varied particle distribution to briefly study dimensional segregation.Advisors/Committee Members: Velhinho, Alexandre.