A UNIFIED SOLUTE DIFFUSION-MODEL FOR COLUMNAR AND EQUIAXED DENDRITIC ALLOY SOLIDIFICATION

被引：113
|
作者：
WANG, CY
BECKERMANN, C
机构：
[1] Department of Mechanical Engineering, The University of Iowa, Iowa City
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1993年 / 171卷 / 1-2期
关键词：
D O I：
10.1016/0921-5093(93)90407-6
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
A unified solute diffusion model is proposed for columnar and equiaxed dendritic alloy solidification, in which nucleation, growth kinetics and dendrite morphology are taken into account. Various applications to a uniformly solidified system are demonstrated, with emphasis on three special cases: complete solute mixing in the liquid, columnar growth with significant dendrite tip undercooling, and equiaxed dendritic growth. Theoretical predictions of microsegregation, eutectic fractions and cooling curves are compared with a number of previous theoretical and experimental results, and good agreement is found.
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页码：199 / 211
页数：13
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