PHASE-FIELD MODEL OF SOLUTE TRAPPING DURING SOLIDIFICATION

被引：323
|
作者：
WHEELER, AA [1 ]
BOETTINGER, WJ [1 ]
MCFADDEN, GB [1 ]
机构：
[1] UNIV BRISTOL, SCH MATH, BRISTOL BS8 1TW, AVON, ENGLAND
来源：
PHYSICAL REVIEW E | 1993年 / 47卷 / 03期
关键词：
D O I：
10.1103/PhysRevE.47.1893
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
A phase-field model for isothermal 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 the segregation predicted 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. Such situations are commonly observed experimentally.
引用
收藏
页码：1893 / 1909
页数：17
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