The aim of this work is to develop a numerical model capable of predicting the grain density in the Mg-based matrix phase of an AZ91/SiC composite, as a function of the total mass fraction of the embedded SiC particles. Based on earlier work in a range of alloy systems, we assume an exponential relationship between the grain density and the maximum supercooling during solidification. Analysis of data from cast samples with different thicknesses, and mass fractions of added SiCp, permits conclusions to be drawn on the role of SiCp in increasing grain density. By fitting the data, an empirical nucleation law is derived that can be used in a micro model. Numerical simulation based on the model can predict the grain density of magnesium alloys containing SiC particles, using the mass fraction of the particles as inputs. These predictions are compared with measured data.

JO - Archives of Metallurgy and Materials L1 - http://so.czasopisma.pan.pl/Content/110127/PDF/AMM-2019-1-05-Lelito.pdf L2 - http://so.czasopisma.pan.pl/Content/110127 IS - No 1 EP - 32 KW - numerical simulation KW - AZ91/SiCp composite KW - micro-model ER - A1 - Lelito, J. A1 - Krawiec, H. A1 - Vignal, V. A1 - Gracz, B. A1 - Żak, P.L. A1 - Szucki, M. PB - Institute of Metallurgy and Materials Science of Polish Academy of Sciences PB - Commitee on Metallurgy of Polish Academy of Sciences VL - vol. 64 JF - Archives of Metallurgy and Materials SP - 29 T1 - Modelling and simulation of the magnesium primary phase crystallization in the AZ91/SiCp composite dependent on mass fraction of SiCp UR - http://so.czasopisma.pan.pl/dlibra/docmetadata?id=110127 DOI - 10.24425/amm.2019.126214