Convection in the two-phase zone of solidifying alloys View Full Text


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Article Info

DATE

1984-01

AUTHORS

A. L. Maples, D. R. Poirier

ABSTRACT

The analysis is applicable to alloy solidification which proceeds horizontally to the center of a mold. The model follows the growth of the solid-liquid zone adjacent to the chill face (the initial transient), the movement of the zone across the mold, and the region of final solidification adjacent to the centerline (the final transient). During solidification the density of the liquid varies across the twophase zone. Consequently, there is natural convection which is treated as flow through a porous medium. The equations for convection are coupled with the equation of solute redistribution between the phases in order to calculate macrosegregation after solidification is complete. Results were computed for alloys which show: (1) “inverse segregation≓ at a cooled-surface; (2) macrosegregation resulting from solidification with the initial transient, a period with a complete two-phase zone, and a final transient; and (3) macrosegregation when the width of the two-phase zone exceeds the semi-width of the mold. More... »

PAGES

163-172

References to SciGraph publications

  • 1981. Modelling Macrosegregation in Electroslag Remelted Ingots in ADVANCES IN METAL PROCESSING
  • 1978-09. Steady state segregation and heat flow in ESR in METALLURGICAL TRANSACTIONS B
  • 1981-09. Effect of fluid flow on macrosegregation in axi-symmetric ingots in METALLURGICAL TRANSACTIONS B
  • 1979-09. Macrosegregation in a multicomponent low alloy steel in METALLURGICAL TRANSACTIONS B
  • 1978-12. Macrosegregation in Rotated Remelted Ingots in METALLURGICAL TRANSACTIONS B
  • 1970-05. Interdendritic fluid flow and macrosegregation; influence of gravity in METALLURGICAL AND MATERIALS TRANSACTIONS B
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    http://scigraph.springernature.com/pub.10.1007/bf02661075

    DOI

    http://dx.doi.org/10.1007/bf02661075

    DIMENSIONS

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