Abstract
Faceted growth of primary Al3Ni phase in the hypereutectic Al-Ni alloy in a high magnetic field was investigated. It was found that faceted growth of primary Al3Ni phase was enhanced in the presence of the magnetic field. However, the fibrous to granular transition of Al-Al3Ni eutectics occurred. The undercooling of primary and eutectic phases during solidification was measured using differential thermal analysis. It was showed that the undercooling of primary phase was hardly changed but that of eutectics markedly increased in the magnetic field. According to Cahn theory of crystal growth, the critical driving force was used to satisfactorily explain the morphology transition in the magnetic field.
Publisher
Trans Tech Publications, Ltd.
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