NDLI: Dendrite growth characteristics within liquid Fe-Sb alloy

Content Provider	Springer Nature Link
Author	Wang, WeiLi Lü, YongJun Qin, HaiYan Wei, BingBo
Copyright Year	2009
Abstract	Bulk samples and small droplets of liquid Fe-10%Sb alloys are undercooled up to 429 K (0.24T $_{L}$) and 568 K (0.32T $_{L}$), respectively, with glass fluxing and free fall techniques. The high undercooling does not change the phase constitution, and only the αFe solid solution is found in the rapidly solidified alloy. The experimental results show that when the undercooling is below 296 K, the growth velocity of αFe dendrite rises exponentially with the increase of undercooling and reaches a maximum value 1.38 m/s. Subsequently, the growth velocity begins to decrease if undercooling further increases. The αFe phase grows into coarse dendrites under small undercooling conditions, whereas it becomes vermicular dendrites in highly undercooled melts. The solute trapping is closely related to the dendrite growth velocity and cooling rate rather than undercooling. Although the solute trapping can be remarkably suppressed by the rapid dendrite growth, the segregationless solidification is not observed in the present experiments due to the large solidification temperature range.
Starting Page	720
Ending Page	728
Page Count	9
File Format	PDF
ISSN	16721799
Journal	Science in China Series G
Volume Number	52
Issue Number	5
e-ISSN	18622844
Language	English
Publisher	SP Science in China Press
Publisher Date	2009-05-03
Publisher Place	Heidelberg
Access Restriction	Subscribed
Subject Keyword	liquid physics dendrite growth solute distribution segregationless solidification Astronomy Mechanics, Fluids, Thermodynamics Physics
Content Type	Text
Resource Type	Article
Subject	Physics and Astronomy

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