Real time synchrotron X-ray observations of solidification in hypoeutectic Al-Si alloys

Nogita, Kazuhiro, Yasuda, Hideyuki, Prasad, Arvind, McDonald, Stuart D., Nagira, Tomoya, Nakatsuka, Noriaki, Uesugi, Kentaro and StJohn, David H. (2013) Real time synchrotron X-ray observations of solidification in hypoeutectic Al-Si alloys. Materials Characterization, 85 134-140. doi:10.1016/j.matchar.2013.08.015


Author Nogita, Kazuhiro
Yasuda, Hideyuki
Prasad, Arvind
McDonald, Stuart D.
Nagira, Tomoya
Nakatsuka, Noriaki
Uesugi, Kentaro
StJohn, David H.
Title Real time synchrotron X-ray observations of solidification in hypoeutectic Al-Si alloys
Journal name Materials Characterization   Check publisher's open access policy
ISSN 1044-5803
1873-4189
Publication date 2013-11-01
Year available 2013
Sub-type Article (original research)
DOI 10.1016/j.matchar.2013.08.015
Volume 85
Start page 134
End page 140
Total pages 7
Place of publication Philadelphia, United States
Publisher Elsevier
Language eng
Subject 2210 Mechanical Engineering
2211 Mechanics of Materials
2500 Materials Science
3104 Condensed Matter Physics
Abstract This paper demonstrates how recent advances in synchrotron technology have allowed for the real-time X-ray imaging of solidification in Al-Si alloys, despite the small difference in atomic number of these elements. The experiments performed at the SPring-8 synchrotron, involved imaging the solidification of Al-1wt.%Si and Al-4wt.%Si alloys under a low-temperature gradient and a cooling rate of around 0.3 C/s. The nucleation and growth of the primary aluminum grains as well as the onset of eutectic solidification were clearly observed. In the alloys containing Al-4wt.%Si, contrast was sufficient to characterize the nucleation rate and growth velocity of the aluminum grains. The importance of improving observation of solidification in the Al-Si system by increasing the time resolution during critical events is discussed.
Keyword Solidification
Synchrotron
X-ray imaging
Q-Index Code C1
Q-Index Status Confirmed Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Mechanical & Mining Engineering Publications
Official 2014 Collection
 
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