CAS OpenIR  > 中科院上海应用物理研究所2011-2019年
In situ synchrotron X-ray imaging on morphological evolution of dendrites in Sn-Bi hypoeutectic alloy under electric currents
Wang, TM; Zhu, J; Kang, HJ; Chen, ZN; Fu, YN; Huang, WX; Xiao, TQ; tmwang@dlut.edu.cn
2014
Source PublicationAPPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
ISSN0947-8396
Volume117Issue:3Pages:1059—1066
AbstractThe growth behavior and morphological evolution of dendrites in solidifying Sn-Bi alloy under electric currents [e.g., direct current (DC) and electric current pulse (ECP)] are in situ studied using synchrotron radiation X-ray imaging technique. The suppression of dendrite growth, floating and rotation of dendrites, refinement and remelting of dendrites are investigated by analyzing a series of animated images captured during the experiments. The modification mechanisms of dendrite morphology by electric fields are discussed based on the in situ and real-time observations. When DC is imposed on the samples, the growth of dendrites is significantly suppressed due to the effect of Joule heat, and a small dendrite freely flows up and rotates due to the common effect of natural convection. When ECP is imposed in the whole solidification process, the outset of solidification is delayed by Joule heat. And due to the accumulation of undercooling, dendrites suddenly nucleate, grow and finally become fine primary dendrite arm spacing. When ECP is imposed during the crystal growth stage only, the dendrites are remelted at first and then reappear along the original growing trajectories, showing the hereditary feature.
KeywordTo-equiaxed Transition Al-cu Alloys Directional Solidification Magnetic-field Current Pulse Electrohydrodynamic Instability Conductivity Gradient Pure Aluminum Fluid Layer Growth
Indexed BySCI
Language英语
WOS IDWOS:000343911600013
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sinap.ac.cn/handle/331007/14190
Collection中科院上海应用物理研究所2011-2019年
Corresponding Authortmwang@dlut.edu.cn
Recommended Citation
GB/T 7714
Wang, TM,Zhu, J,Kang, HJ,et al. In situ synchrotron X-ray imaging on morphological evolution of dendrites in Sn-Bi hypoeutectic alloy under electric currents[J]. APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,2014,117(3):1059—1066.
APA Wang, TM.,Zhu, J.,Kang, HJ.,Chen, ZN.,Fu, YN.,...&tmwang@dlut.edu.cn.(2014).In situ synchrotron X-ray imaging on morphological evolution of dendrites in Sn-Bi hypoeutectic alloy under electric currents.APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING,117(3),1059—1066.
MLA Wang, TM,et al."In situ synchrotron X-ray imaging on morphological evolution of dendrites in Sn-Bi hypoeutectic alloy under electric currents".APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING 117.3(2014):1059—1066.
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