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The thermodynamics and kinetics of isothermal solidification in binary alloy melts were simulated in a 2-dimensional model incorporating the effects of nearest and next nearest neighbours at the solid-liquid interfaces, taking into account the simultaneous diffusion in the melt of all diffusing particles (atoms) and allowing solid-liquid interface rearrangement on a local scale. The next nearest neighbour interaction and the surface rearrangement were shown to have large effects on the resulting morphologies. Further, the influences of the operating diffusion coefficient and the sticking rule for the solidifying particle were analysed. A wide range of growth modes, dendritic, massive, equiaxed, eutectic, and transitions thereof during solidification, also involving change of time dependency of the growth velocity, as observed in practice, could be given a rationalistic basis.

Additional information

Authors: HAEMERS T A M, Delft University of Technology (NL);RICKERBY D G, JRC Ispra (IT);MITTEMEIJER E J, Max-Planck-Institute for Materials Research, Stuttgart (DE)
Bibliographic Reference: Article: Modelling and Simulation in Materials Science and Engineering (1998)
Record Number: 199811333 / Last updated on: 1998-11-10
Original language: en
Available languages: en