TY - JOUR
T1 - Real time synchrotron X-ray observations of solidification in hypoeutectic Al-Si alloys
AU - Nogita, Kazuhiro
AU - Yasuda, Hideyuki
AU - Prasad, Arvind
AU - McDonald, Stuart D.
AU - Nagira, Tomoya
AU - Nakatsuka, Noriaki
AU - Uesugi, Kentaro
AU - Stjohn, David H.
PY - 2013/10/14
Y1 - 2013/10/14
N2 - 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.
AB - 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.
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U2 - 10.1016/j.matchar.2013.08.015
DO - 10.1016/j.matchar.2013.08.015
M3 - Article
AN - SCOPUS:84885104040
VL - 85
SP - 134
EP - 140
JO - Materials Characterization
JF - Materials Characterization
SN - 1044-5803
ER -