A Process Sensor for Locating the Liquid-Solid Boundary through the Mold of a Casting

Date
1996
Authors
Fitting, D.
Dubé, W.
Siewert, T.
Paran, J.
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Altmetrics
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Abstract

Accurate process control of single-crystal and directionally-solidified castings requires knowledge of the exact location of the solidifying front. If the front advances too rapidly, single crystal growth in a preferred orientation degenerates into the formation of polycrystals. A solidification front which moves more slowly than necessary is wasteful of the casting resources. A sensing technology is being developed which determines the location of the boundary between a solidifying crystal and liquid metal. The sensing method utilizes the ordered pattern of x-rays diffracted from the solid as an absolute indicator of the liquid-crystal interface.

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