EUTECTIC GROWTH UNDER RAPID SOLIDIFICATION CONDITIONS
EUTECTIC GROWTH UNDER RAPID SOLIDIFICATION CONDITIONS
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DOI：
10.1007/bf02650266
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发表时间：
1991-12-01
期刊：
影响因子：
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通讯作者：
TRIVEDI, R
中科院分区：
文献类型：
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作者：
KURZ, W;TRIVEDI, R
本文推广了作者最近发展的共晶快速凝固模型：（1）扩散场局部化的影响导致一个复杂的级数解，它由一个近似值来描述，这使得共晶显微组织的预测变得简单;（2）通过一个生长速率来考虑在固-液界面处局部平衡的丧失。依赖于有效液相线斜率和溶质分配系数，导致共晶温度的降低和在大于每秒几厘米的生长速率下共晶相的溶质含量的显著增加。 高增长率效应的重要性证明了一个线性化的相图。
The model for rapid solidification of eutectics developed recently by the authors is extended: (1) the effect of the localization of the diffusion field which leads to a complex series solution is described by an approximation which makes the prediction of eutectic microstructures a simple matter and (2) the loss of local equilibrium at the solid-liquid interface is taken into account through a growth rate-dependent effective liquidus slope and solute distribution coefficient, leading to a depression of the eutectic temperature and a substantial increase in the solute content of the eutectic phases at growth rates larger than some centimeters per second. The importance of high growth rate effect is demonstrated for a linearized phase diagram.