Solidification microstructures near the limit of absolute stability View Full Text


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Article Info

DATE

1989-04

AUTHORS

R. Trivedi, J. A. Sekhar, V. Seetharaman

ABSTRACT

A theoretical model of microstructural transitions in a binary alloy is examined to establish the conditions under which dendritic to cellular to planar interface transitions occur at high imposed growth rates. Critical experimental studies then are carried out in a transparent carbon-tetrabromide system to study the changes in microstructures which occur in the velocity regime where the planar interface is unstable. Low velocity transitions from a planar to cellular to dendritic structure and the high velocity transition from dendritic to microcellular structure are observedin situ. It is shown that these microstructural transitions occur continuously as the growth rate is increased. A reverse transition, from microcellular to dendritic structure with an increase in composition at a given velocity, also is observed. These results then are compared with the theoretical model. More... »

PAGES

769-777

References to SciGraph publications

  • 1984-01. The Effect of Rapid Solidification Velocity on the Microstructure of Ag-Cu Alloys in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1984-06-01. Interdendritic Spacing: Part I. Experimental Studies in METALLURGICAL AND MATERIALS TRANSACTIONS A
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    URI

    http://scigraph.springernature.com/pub.10.1007/bf02667594

    DOI

    http://dx.doi.org/10.1007/bf02667594

    DIMENSIONS

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