Visualization of freckle formation induced by forced melt convection in solidifying GaIn alloys

被引：49
作者：
Boden, S. [1 ]
Eckert, S. [1 ]
Gerbeth, G. [1 ]
机构：
[1] Forschungszentrum Dresden Rossendorf, MHD Dept, D-01314 Dresden, Germany
来源：
MATERIALS LETTERS | 2010年 / 64卷 / 12期
关键词：
Directional solidification; Dendritic growth; Convection; Segregation; X-ray radioscopy; ROTATING MAGNETIC-FIELD; PB-SN ALLOYS; CHANNEL FORMATION; DIRECTIONAL SOLIDIFICATION; DENDRITIC GROWTH; PULSE SEQUENCES; FLOW; MACROSEGREGATION; SEGREGATION;
D O I：
10.1016/j.matlet.2010.03.044
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A bottom-up solidification of a Ga-25 wt.%In alloy under the influence of buoyancy-driven and electromagnetically driven convection was investigated by X-ray radioscopy. The main effect of the flow on the solidification is determined by the flow-induced redistribution of solute concentration which results in a change of the growth direction of the dendrites and the preference of secondary branches for an accelerated or decelerated growth. The experiments demonstrate clearly how the interdendritic flow contributes to the formation of spacious segregation freckles. (C) 2010 Elsevier B.V. All rights reserved.
引用
收藏
页码：1340 / 1343
页数：4
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