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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)
2017
Source PublicationJOURNAL OF CRYSTAL GROWTH
ISSN0022-0248
EISSN1873-5002
Volume476Pages:38-44
SubtypeArticle
AbstractEffect 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.
KeywordA1.Melt superheat A1.Mean grain size A1.Mean growth rate A1.Mean nucleation rate A1.Synchrotron X-ray radiography A1.Nucleation undercooling
DOI10.1016/j.jcrysgro.2017.07.001
WOS KeywordX-RAY RADIOGRAPHY ; REAL-TIME OBSERVATION ; DIRECTIONAL SOLIDIFICATION ; GRAIN-REFINEMENT ; PHASE-CHANGE ; PART I ; AL ; MICROSTRUCTURE ; GROWTH ; KINETICS
Indexed BySCI ; EI ; SCOPUS ; ADS
Language英语
WOS Research AreaCrystallography ; Materials Science ; Physics
WOS SubjectCrystallography ; Materials Science, Multidisciplinary ; Physics, Applied
WOS IDWOS:000410917600007
EI Accession Number20173704145295
EI KeywordsCopper alloys - Grain growth - Grain refinement - Grain size and shape - Growth rate - Nucleation - Solidification - Synchrotron radiation - Synchrotrons - Undercooling
EI Classification Number544.2 Copper Alloys - 641.1 Thermodynamics - 802.3 Chemical Operations - 932.1.1 Particle Accelerators - 933.1.2 Crystal Growth
ADS Bibcode2017JCrGr.476...38L
ADS URLhttps://ui.adsabs.harvard.edu/abs/2017JCrGr.476...38L
ADS CITATIONShttps://ui.adsabs.harvard.edu/abs/2017JCrGr.476...38L/citations
Citation statistics
Cited Times:1 [ADS]
Document Type期刊论文
Identifierhttp://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 AffilicationInstitute 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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