枝晶生长的稳态理论新进展

Recent Progress of Steady State Theory of Dendritic Growth

本文从自由生长和强制生长两个方面着重评述了单相合金枝晶生长的稳态理论新进展。发现稳态理论近年来有两个重要的进展，一是比较好地解决了自由生长枝晶尖端的稳态扩散场问题；另一是理论分析和实验研究的结果都表明，强制生长枝晶一次间距选择一个较宽的容许范围。

The recent progress was reviewed on steady state theory of both free and constrained dendritic growth of a single phase alloy.It was found that recent researches succeeded in two aspects:one lay in that the long term problem of the steady state diffusion field of free dendritic growth was solved theoretically;the other both theory and experiment found that there exists an allowable range of primary spacings of constrained dendritic growth,and the average spacing is remarkably history dependent on solidification parameters.