DENDRITE GROWTH VELOCITIES IN UNDERCOOLED NI-SI ALLOYS

被引：29
|
作者：
COCHRANE, RF [1 ]
GREER, AL [1 ]
ECKLER, K [1 ]
HERLACH, DM [1 ]
机构：
[1] DLR,INST RAUMSIMULAT,W-5000 COLOGNE 90,GERMANY
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 1991年 / 133卷
关键词：
D O I：
10.1016/0921-5093(91)90165-J
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Dendrite growth velocities measured in highly undercooled Ni-Si, at low solute concentrations, show evidence of the velocity enhancement predicted by the marginal stability hypothesis. As in earlier work, there is a critical undercooling below which growth velocities fit well the predictions of current models, and above which velocity varies linearly with undercooling. The critical undercooling is composition-dependent and correlates well with the reported onset of grain refinement.
引用
收藏
页码：698 / 701
页数：4
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