Numerical simulation for isothermal dendritic growth of succinonitrile-acetone alloy

来源期刊：中国有色金属学报(英文版)2008年第3期

论文作者：陈志 陈长乐 郝丽梅

文章页码：654 - 659

Key words：phase field method; succinonitrile-acetone alloy; dendritic growth; tip velocity; anti-trapping current; anisotropy

Abstract: Numerical simulation based on phase field method was developed to describe the solidification of two-dimensional isothermal binary alloys. The evolution of the interface morphology was shown and the effects of phase field parameters were formulated for succinonitrile-acetone alloy. The results indicate that an anti-trapping current(ATC) can suppress many trapped molten packets, which is caused by the thickened interface. With increasing the anisotropy value from 0 to 0.05, a small circular seed grows to develope secondary dendritic, dendritic tip velocity increases monotonically, and the solute accumulation of solid/liquid interface is diminished distinctly. Furthermore, with the increase of the coupling parameter value, the interface becomes unstable and the side branches of crystals appear and grow gradually.

基金信息：the National Natural Science Foundation of China