PREDICTION OF SOLUTE TRAPPING AT HIGH SOLIDIFICATION RATES USING A DIFFUSE INTERFACE PHASE-FIELD THEORY OF ALLOY SOLIDIFICATION

被引：43

作者：

BOETTINGER, WJ

WHEELER, AA

MURRAY, BT

MCFADDEN, GB

机构：

[1] National Institute of Standards and Technology, Gaithersburg

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1994年 / 178卷 / 1-2期

关键词：

D O I：

10.1016/0921-5093(94)90546-0

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

A phase-field model for solidification of a binary alloy is developed that includes gradient energy contributions for the phase field and for the composition field. When the gradient energy coefficient for the phase field is smaller than that for the solute field, planar steady-state solutions exhibit a reduction in segregation in the liquid phase ahead of an advancing front (solute trapping), and in the limit of high solidification speeds predict alloy solidification with no redistribution of composition. Comparison is made with the Aziz model of solute trapping.

引用

页码：217 / 223

页数：7

共 27 条

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