Modelling of Dendritic Growth during Unidirectional Solidification by the Method of Cellular Automata

Abstract:

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Modelling was carried out to investigate the internal dendrite grains structure formation from a liquid two-component solution in the area adjacent to a mould wall. For the simulation, our own model and computer program based on CAFD (Cellular Automata Finite Differences) were used. In modelling, the effect of process conditions and material-related parameters, e.g. nucleation temperature, heat exchange rate, interfacial energy, crystal orientation with respect to the casting wall, etc. on the nature of the dendritic grain growth was examined. It was demonstrated that the profile of concentration field in a near-mould-wall zone impedes the growth of the solid phase in the direct vicinity of the wall. A local melting down of the grains of a solid phase due to the segregation of admixtures reducing the alloy point of liquidus is also possible.

Info:

Periodical:

Edited by:

A. Roósz, V. Mertinger, P. Barkóczy and Cs. Hoó

Pages:

217-222

DOI:

10.4028/www.scientific.net/MSF.649.217

Citation:

A. A. Burbelko et al., "Modelling of Dendritic Growth during Unidirectional Solidification by the Method of Cellular Automata", Materials Science Forum, Vol. 649, pp. 217-222, 2010

Online since:

May 2010

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Price:

$35.00

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