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

  • D. W. Fitting
  • W. P. Dubé
  • T. A. Siewert
  • J. Paran

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.

Keywords

Diffraction Spot Mold Wall Mold Material Diffuse Ring Nickel Sample 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • D. W. Fitting
    • 1
  • W. P. Dubé
    • 1
  • T. A. Siewert
    • 1
  • J. Paran
    • 1
  1. 1.Materials Reliability Division, Materials Science and Engineering LaboratoryNational Institute of Standards and TechnologyBoulderUSA

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