Author(s)

O. Bogdan

Abstract

The research objective was to establish a criterion with which to assess whether a particle will be included in the metal matrix without being expelled before the solidification front. To this purpose, a program lias been used that simulates the heat transfer by means of finite elements. In the simulation, the Al - 1 1.8 Si, Al - 4.4 Cu - 0.5 Mg, Al - 4.5 Cu - 1.5 Mg alloys have been considered with A^Og, graphite, SiC, Ti(>2, ZrQ2 and mica particles as dispersed material. The paper shows the influence of some factors such as the particle conductivity, the matrix conductivity and the particle temperature upon the solidification front geometry and upon the probability that the dispersed material is not expelled before the solidification front. 1 Introduction It is known that one of the most important factors that influences the final

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