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Unformatted text preview: casting area; no heat loss across this interface. The riser will not be effective; the thin section has the smallest V/A ration and therefore freezes first. Even though the riser has the longest solidification time, the thin section isolates the thick section from the riser, preventing liquid metal from feeding from the riser to the thick section. The shrinkage will occur in the thick section....
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- Spring '09