Paper Title:

Rheological Properties of Molten Al-Cu Alloys for Manufacturing Metallic Foam

Periodical Solid State Phenomena (Volumes 116 - 117)
Main Theme Semi-Solid Processing of Alloys and Composites
Edited by C.G. Kang, S.K. Kim and S.Y. Lee
Pages 656-660
DOI 10.4028/
Citation Soo Han Park et al., 2006, Solid State Phenomena, 116-117, 656
Online since October 2006
Authors Soo Han Park, Yong Su Um, Bo Young Hur
Keywords Al-Cu Alloys, Metallic Foam, Surface Tension, Viscosity
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The surface tension and the viscosity characteristics of molten metal are the most important factors in casting process and metallic foam manufacturing especially. The surface tension (by the modified ring method) and the viscosity (by the rotational method) of molten Al-Cu alloys have been measured under high purity Ar gas atmosphere. The surface tension and the viscosity of Al-Cu alloys were investigated in the temperature range of 660-800oC, and the effects of the additional elements were investigated at the 660~680. The result show that the surface tension and viscosity of these alloys decrease with increasing temperature together. The viscosity of Al-Cu alloys near the melting point is about 4.7 to 5.7 [mPa.s]. The effect of additional thickening elements has the tendency that is the surface tension decreased and the viscosity increased. This anomalous behavior has the relation of the preferential adsorption of high activity elements on the surface.