Influence of Rapid Shear-Rate Changes on Microstructure Formation during Semi-Solid Processing

Abstract:

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The solidification behavior of the semi-solid slurry with rapid shear-rate changes was investigated by using succinonitrile-5at.%water transparent alloy and Sn-15wt.%Pb alloy on a self-made apparatus. The results showed that the rapid changes of shear-rate improved the nucleation and promoted the globular growth of solidification microstructure in the stirred melt. The increase of shear-rate was in favor of promoting the grain growth with globular shape to a certain extent, however, when the shear-rate was beyond a critical value, the further increase of the shear-rate will lead the disappearance of the globular crystals. Thus, the microstructure of semi-solid processing could be refined by a controlled stirring process.

Info:

Periodical:

Solid State Phenomena (Volumes 116-117)

Edited by:

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

Pages:

155-158

DOI:

10.4028/www.scientific.net/SSP.116-117.155

Citation:

X. Lin et al., "Influence of Rapid Shear-Rate Changes on Microstructure Formation during Semi-Solid Processing", Solid State Phenomena, Vols. 116-117, pp. 155-158, 2006

Online since:

October 2006

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Price:

$35.00

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