The effect of convection on the dendrite to eutectic transition View Full Text


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Article Info

DATE

1986-06

AUTHORS

J. D. Verhoeven, J. T. Mason, R. Trivedi

ABSTRACT

Vertical solidification experiments have been carried out in binary eutectic metal alloy systems using both upward and downward solidification directions with solutes heavier and lighter than the solvent metal. Hence, conditions of all four possible combinations of thermal and solutal Rayleigh numbers were studied: RaT/Ras = −/ −, −/+, +/+, +/ −. Compositions close to eutectic values were examined under conditions of gradient and velocity which produced cellular, dendritic, and eutectic structures. The experimental results indicate that solutal induced convection plays a dominant role in controlling both dendrite/liquid interface shape and the dendrite clustering effect at the dendrite/eutectic transition. In both the presence or absence of cluster formation, the transition is shown to occur by a gradual change in dendrite size, morphology, and number. More... »

PAGES

991-1000

References to SciGraph publications

  • 1973-11. The dendrite-to-composite transition in off-eutectic Sn-Pb alloys in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1984-09. Primary dendrite spacing: Part II. Experimental studies of Pb-Pd and Pb-Au alloys in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1975-09. Measurement of liquid metal diffusion coefficients from steady-state solidification experiments in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1984-12. Thermosolutal convection during directional solidification in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1984-12. Convection-induced distortion of a solid-liquid interface in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1981-02. Solutal convection induced macrosegregation and the dendrite to composite transition in off-eutectic alloys in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1975-12. The effect of solute convection upon macrosegregation in off-eutectic composite growth in METALLURGICAL AND MATERIALS TRANSACTIONS B
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    http://scigraph.springernature.com/pub.10.1007/bf02661265

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    http://dx.doi.org/10.1007/bf02661265

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