In-Situ Observation of Dendrite Growth During Solidification of Al-10wt.%Cu Alloy Under Pulsed Magnetic Field

Time-resolved X-ray imaging with intense,high brightness and monochromatic third-generation synchrotron radiation,and a high-resolution fast-readout charge coupled device(CCD)system have been used to in-situ observe the dendrite growth of a solidifying Al-10wt.%Cu alloy under pulsed magnetic field.T...

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Published in钢铁研究学报：英文版 no. S1; pp. 229 - 232
Main Author CAO Fei ZHU Jing WANG Tong-min FU Ya-nan XIE Hong-lan CAO Zhi-qiang LI Ting-ju
Format Journal Article
LanguageEnglish
Published 2012
Subjects
alloy
aluminum
field
magnetic
pulsed
radiation
solidification
synchrotron
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Summary:Time-resolved X-ray imaging with intense,high brightness and monochromatic third-generation synchrotron radiation,and a high-resolution fast-readout charge coupled device(CCD)system have been used to in-situ observe the dendrite growth of a solidifying Al-10wt.%Cu alloy under pulsed magnetic field.The imaging results indicate that the secondary dendrite tip growth underwent a rapid deceleration once the pulsed magnetic field was applied.The remelting phenomenon of small dendrites was also observed when applying the pulsed magnetic field at the beginning of solidification.This is related to the Joule heat effect caused by the imposed pulsed magnetic field.Whilst,fragmentation of the dendrites usually caused by the forced convection induced by pulsed magnetic field was not found in the present work.
Bibliography:11-3678/TF
CAO Fei;ZHU Jing;WANG Tong-min;FU Ya-nan;XIE Hong-lan;CAO Zhi-qiang;LI Ting-ju;School of Materials Science and Engineering,Dalian University of Technology;Shanghai Synchrotron Radiation Facility,Shanghai Institute of Applied Physics
ISSN:1006-706X
2210-3988