Microstructural Study of Primary Solid Particles in High Density Semi-Solid Al-Zn-Mg Alloy during Stirring

Abstract:

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The formation and character of grain boundaries in the primary solid particles observed in the metal slurries of stircast Al-4wt%Zn-1wt%Mg alloy were studied. In the semi-solid state of the solid fraction (fs) of more than 0.5, fracturing of solid particles appears to be dominated by shear force at high temperature, whilst in fs < 0.4 dendritic fragmentations are expected to occur by grain boundary melting. In case of shear rupture at fs > 0.5 coarsening of spherical solid particles takes place by Gibbs-Thompson effect of small particles remelting leading to solute redistribution.

Info:

Periodical:

Solid State Phenomena (Volumes 116-117)

Edited by:

C.G. Kang, S.K. Kim and S.Y. Lee

Pages:

308-311

DOI:

10.4028/www.scientific.net/SSP.116-117.308

Citation:

J. H. Lee et al., "Microstructural Study of Primary Solid Particles in High Density Semi-Solid Al-Zn-Mg Alloy during Stirring", Solid State Phenomena, Vols. 116-117, pp. 308-311, 2006

Online since:

October 2006

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Price:

$35.00

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