Evaluation of solid fraction in a rheocast aluminum die casting alloy by a rapid quenching method

A new approach to evaluate the solid fraction of semi-solid slurries is reported. The approach applies a thin-channel vacuum mold to rapidly quench semi-solid slurries at different rheocasting times. The slurry temperatures are analyzed from the cooling curves. The corresponding solid fraction data...

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Bibliographic Details
Published in:Scripta materialia 2008-11, Vol.59 (10), p.1091-1094
Main Authors: Wannasin, J., Canyook, R., Burapa, R., Sikong, L., Flemings, M.C.
Format: Article
Language:English
Subjects:
Cooling curves
Die casting
Molds
Quantitative metallography
Quenching method
Rheocasting
Semi-solid metal
Semi-solid processing
Slurries
Solid fraction
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Summary:A new approach to evaluate the solid fraction of semi-solid slurries is reported. The approach applies a thin-channel vacuum mold to rapidly quench semi-solid slurries at different rheocasting times. The slurry temperatures are analyzed from the cooling curves. The corresponding solid fraction data are obtained from standard quantitative metallography. A correction of the data is then conducted using the average growth layer of the solid particles. The analyzed solid fraction agrees well with the data from the Scheil model.
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2008.07.029