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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 12    No. 1    February 2002

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Assessment of scaling factor in
modified dendrite growth model
ZHANG Rui-feng(张瑞丰),SHEN Ning-fu(沈宁福),CAO Wen-bo(曹文博)

Research Center for Materials,Zhengzhou University,
Zhengzhou 450002, China

Abstract:A model for dendrite growth during rapid solidification was established on the basis of BCT model and marginal stability criterion through modified Peclet numbers.Taking into account the interaction of diffusion fields, including solute diffusion field and thermal diffusion field around the dendritetip,the model obtain a satisfactory results to predict the dendrite velocity and the tipradius,which agrees well with the experimental data from references in Cu-Ni alloy.

 

Key words: rapid solidification;undercooled melt;dendrite growth;Cu-Ni alloy

ISSN 1672-7029
CN 43-1423/U

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