Modeling of solidification microstructures in concentrated solutions and intermetallic systems View Full Text


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Article Info

DATE

1990-04

AUTHORS

R. Trivedi, W. Kurz

ABSTRACT

Most of the theoretical models for the predictions of solidification microstructure and solute segregation are based on the assumption mat the solute distribution coefficient,k, is independent of temperature. For concentrated alloys and for alloys near intermetallic compounds,k may vary significantly with temperature. A theoretical analysis which shows the necessary modifications in the theoretical models which must be made ifk varies with temperature is developed. It is shown that for phase diagrams with linear liquidus and solidus segments, many of the results derived with constantk can be used if the solute distribution coefficientk is replaced by a modified parameterk* which includesk as well as the derivative ofk with composition. The application of the model to concentrated alloys and to compositions near intermetallic phases is discussed. It is shown that the variation ink with temperature can significantly alter the composition dependence of dendritic microstructural scales and change the solute segregation profiles in solidified alloys. More... »

PAGES

1311-1318

References to SciGraph publications

  • 1987-05-01. Dendritic growth of undercooled nickel-tin: Part I in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1984-06-01. Interdendritic Spacing: Part I. Experimental Studies in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1984-06-01. Interdendritic Spacing: Part II. A Comparison of Theory and Experiment in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1980-11. Primary dendrite spacing of lead dendrites in Pb-Sn and Pb-Au Alloys in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1981-06. Solute redistribution during solidification with rapid solid state diffusion in METALLURGICAL AND MATERIALS TRANSACTIONS A
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    http://scigraph.springernature.com/pub.10.1007/bf02656547

    DOI

    http://dx.doi.org/10.1007/bf02656547

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