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.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.
synchrotron radiation aluminum alloy solidification pulsed magnetic field
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,Dalian 116024,Liaoning,C Shanghai Synchrotron Radiation Facility.Shanghai Institute of Applied Physics,Shanghai 215600,Shangh
国际会议
The 7th International Conference on Electromagnetic Processing of Materials(第七届冶金与材料电磁过程国际大会)
北京
英文
1-4
2012-10-22（万方平台首次上网日期，不代表论文的发表时间）