Permeabilities for flow of interdendritic liquid in equiaxial structures

D. R. Poirier, S. Ganesan

Research output: Contribution to journalArticle

59 Scopus citations

Abstract

Permeabilities for the flow of interdendritic liquid in Al-15.6wt.%Cu alloy with equiaxial structures were measured and found to be structure sensitive. The center-to-center distance between grains (153-259 μm), specific surface area (2.57 × 10-2-6.96 × 10-1 μm-1) and volume fraction of liquid (0.166-0.434) were the structural parameters studied in this investigation. During a test, coarsening of the dendrites occurred, wherein the solid morphology went from dendritic to dendritic-globular and ultimately to globular for longer times. The permeabilities of the globular structures (non-dendritic) were found to be approximately one order of magnitude greater than the permeabilities for the dendritic-globular structures, when the volume fraction of liquid is approximately 0.3. The dimensionless permeability, based on the specific surface, was found to represent best the empirical data for the globular and dendritic morphologies and the theoretical results for flow through different arrays of uniform spheres.

Original languageEnglish (US)
Pages (from-to)113-123
Number of pages11
JournalMaterials Science and Engineering A
Volume157
Issue number1
DOIs
StatePublished - Sep 1 1992

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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