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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; tmwang@dlut.edu.cn | |
| 2014 | |
| Source Publication | APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
 |
| ISSN | 0947-8396 |
| Volume | 117Issue:3Pages:1059—1066 |
| Abstract | 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. |
| Keyword | To-equiaxed Transition Al-cu Alloys Directional Solidification Magnetic-field Current Pulse Electrohydrodynamic Instability Conductivity Gradient Pure Aluminum Fluid Layer Growth |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000343911600013 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sinap.ac.cn/handle/331007/14190 |
| Collection | 中科院上海应用物理研究所2011-2020年 |
| Corresponding Author | tmwang@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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