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Microstructure of stir-cast metals
Journal article

Microstructure of stir-cast metals

R.D. Doherty, Ho-In Lee and E.A. Feest
Materials science and engineering, v 65(1), pp 181-189
1984

Abstract

The non-dendritic microstructure of stircast metals is discussed in terms of the shape stability produced by a high density of growing solid particles. This high density appears to be due to the fragmentation of the initial dendrites. The model of fragmentation due to the formation and subsequent melting of high energy grain boundaries is discussed and is shown to be compatible with a wide range of microstructural observations. New observations are reported on the formation of large-angle grain boundaries in bent aluminium single crystals, on the build-up (and collapse) of a solid-like shear strength in metallic slurries as the stirring conditions are varied and on the stir casting of eutectic alloys. The behaviour of the metallic slurries is briefly compared with recent observations on the dramatic loss of strength of porous sintered powders when exposed to liquid solutions that wet the grain boundaries.

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Collaboration types
Domestic collaboration
International collaboration
Web of Science research areas
Materials Science, Multidisciplinary
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