DENDRITE GROWTH VELOCITIES IN UNDERCOOLED NI-SI ALLOYS

被引：28

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

页码：698 / 701

页数：4

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