Institutional Repository of China Spallation Neutron Source
| Effect of the melt superheat on equiaxed solidification of Al-20 wt% Cu alloy investigated by in situ synchrotron radiography | |
Luo, SF; Yang, GY; Xiao, L ; Huang, WX; Yuan, QX; Jie, WQ; Huang WX(黄万霞); Yuan QX(袁清习)
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| 2017 | |
| Source Publication | JOURNAL OF CRYSTAL GROWTH
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| ISSN | 0022-0248 |
| EISSN | 1873-5002 |
| Volume | 476Pages:38-44 |
| Subtype | Article |
| Abstract | Effect of the melt superheat on equiaxed solidification of Al-20 wt% Cu alloy was investigated by in-situ synchrotron radiography at Beijing Synchrotron Radiation Facility. For comparison, the corresponding DSC analysis was also conducted. It was found that the grain size decreased with increasing the melt superheat. The relationship between the final mean grain size and the melt superheat can be expressed as: d = 4919: 3 x Delta T-0:33. During solidification, the mean grain size increased sharply in the first 70s, then reached the final grain size gradually. Furthermore, with increasing the melt superheat, the mean nucleation rate increased, which can be attributed to the fact that increasing the melt superheat led to an increase in nucleation undercooling, and the growth rate and the duration of free growth stage decreased. As the melt superheat increased from 100 degrees C to 160 degrees C, the mean nucleation rate increased by 78.2% while the mean growth rate only decreased by 19.3%, which indicated that the high mean nucleation rate and the consequent low mean growth rate may be the real reasons for grain refinement. The increased nucleation density caused earlier growth deceleration due to solutal impingement effects. (C) 2017 Elsevier B.V. All rights reserved. |
| Keyword | A1.Melt superheat A1.Mean grain size A1.Mean growth rate A1.Mean nucleation rate A1.Synchrotron X-ray radiography A1.Nucleation undercooling |
| DOI | 10.1016/j.jcrysgro.2017.07.001 |
| WOS Keyword | X-RAY RADIOGRAPHY ; REAL-TIME OBSERVATION ; DIRECTIONAL SOLIDIFICATION ; GRAIN-REFINEMENT ; PHASE-CHANGE ; PART I ; AL ; MICROSTRUCTURE ; GROWTH ; KINETICS |
| Indexed By | SCI ; EI ; SCOPUS ; ADS |
| Language | 英语 |
| WOS Research Area | Crystallography ; Materials Science ; Physics |
| WOS Subject | Crystallography ; Materials Science, Multidisciplinary ; Physics, Applied |
| WOS ID | WOS:000410917600007 |
| EI Accession Number | 20173704145295 |
| EI Keywords | Copper alloys - Grain growth - Grain refinement - Grain size and shape - Growth rate - Nucleation - Solidification - Synchrotron radiation - Synchrotrons - Undercooling |
| EI Classification Number | 544.2 Copper Alloys - 641.1 Thermodynamics - 802.3 Chemical Operations - 932.1.1 Particle Accelerators - 933.1.2 Crystal Growth |
| ADS Bibcode | 2017JCrGr.476...38L |
| ADS URL | https://ui.adsabs.harvard.edu/abs/2017JCrGr.476...38L |
| ADS CITATIONS | https://ui.adsabs.harvard.edu/abs/2017JCrGr.476...38L/citations |
| Citation statistics |
Cited Times:2 [ADS]
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| Document Type | 期刊论文 |
| Identifier | http://ir.ihep.ac.cn/handle/311005/284799 |
| Collection | 中国科学院高能物理研究所_中国散裂中子源 多学科研究中心 |
| Affiliation | 中国科学院高能物理研究所 |
| First Author Affilication | Institute of High Energy |
| Recommended Citation GB/T 7714 | Luo, SF,Yang, GY,Xiao, L,et al. Effect of the melt superheat on equiaxed solidification of Al-20 wt% Cu alloy investigated by in situ synchrotron radiography[J]. JOURNAL OF CRYSTAL GROWTH,2017,476:38-44. |
| APA | Luo, SF.,Yang, GY.,Xiao, L.,Huang, WX.,Yuan, QX.,...&袁清习.(2017).Effect of the melt superheat on equiaxed solidification of Al-20 wt% Cu alloy investigated by in situ synchrotron radiography.JOURNAL OF CRYSTAL GROWTH,476,38-44. |
| MLA | Luo, SF,et al."Effect of the melt superheat on equiaxed solidification of Al-20 wt% Cu alloy investigated by in situ synchrotron radiography".JOURNAL OF CRYSTAL GROWTH 476(2017):38-44. |
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