Permeability for flow of liquid through equiaxial mushy zones

✍ Scribed by D.R. Poirier; P. Ocansey

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 929 KB
• Volume: 171
• Category: Article
• ISSN: 0921-5093
• DOI: 10.1016/0921-5093(93)90410-g

✦ Synopsis

An experimental method for measuring the permeability for flow through equiaxiai mushy zones of Pb-Sn alloys was devised. With Pb-Sn alloys, dendritic structures could be maintained during the permeability tests. The volume fraction of liquid was varied from 0.31 to as high as 0.49. With the results presented as dimensionless permeabilities, reasonably good agreement among globular, dendritic-globular, and dendritic microstructures was obtained for previous data on borneol-paraffin and Al-15.6wt.%Cu alloys, and the Pb-Sn alloys studied herein. The empirical data agree approximately with the analytical results for flow through regular arrays of spheres, which suggests that the analytical results can be used for extrapolations of permeability when gc > 0.49.