Author(s)

A. Antoni-Zdziobek, F. Durand & Y. Du Terrail Couvat

Abstract

A one-dimensional model based on finite difference method has been developed to simulate the dissolution behaviour of refractory additions (Nb, Mo or Ni) in molten aluminium. It couples the heat transfer, diffusive and convective, and the heat source generated by the mixing process. In this model, a variation of the melt temperature and of the solute content is taken into account. The dissolution rate is found to be a strong function of the thermodynamical supersaturation. Through the examples of application, the influence of the phase diagram and of the enthalpy of mixing are discussed. 1 - Introduction For most of the refractory alloys, the content of intersticial elements (typically carbon and oxygen) must be strictly controlled at a very

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