Regular Structure Formation of Hypermonotectic Al-In Alloys

Abstract:

Since the liquid / liquid separation occurs in hypermonotectic alloys and the liquid / liquid interface agitates mass transfer around solidifying front, it is rather difficult to achieve the aligned-rod structure. The high magnetic filed such as 10T achieved the aligned-rod structure in the Al-10at%In alloys. The in-situ observations of the monotectic solidification in the Al-10at%In alloys were performed using synchrotron radiation X-ray. Coarse and fine In rods coexisted during the unidirectional solidification without magnetic field. The local melt flow induced by the In-rich liquid / Al-rich liquid interface enhanced the mass transfer and consequently the coarse rods could continuously grow. The suppression of the local melt flow of which scale was several 10 m by the high static magnetic field resulted in the aligned-rod structure.

• Periodical: Materials Science Forum (Volume 649)
• Pages: 131-136
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.649.131
• Online since: May 2010
• Authors: Hideyuki Yasuda, S. Kato, T. Shinba, T. Nagira, M. Yoshiya, Akira Sugiyama, K. Umetani, Kentaro Uesugi
• Keywords: Convection, In Situ Observation, Monotectic Solidification

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