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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;黄万霞
2014
发表期刊APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
卷号117期号:3页码:1059-1066
摘要The 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.
学科领域Materials Science; Physics
DOI10.1007/s00339-014-8537-6
收录类别SCI
WOS记录号WOS:000343911600013
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224825
专题多学科研究中心
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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.,...&Xiao, TQ;黄万霞.(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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