The transition from columnar to equiaxed dendritic growth in proeutectic, low-volume fraction copper, Pb−Cu alloys View Full Text


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Article Info

DATE

1992-06

AUTHORS

Shinwoo Kim, R. N. Grugel

ABSTRACT

Lead, 17.1, 11.2, and 5 volume fraction copper (14, 9, and 4 wt pct Cu) alloys have been directionally solidified at constant growth velocities ranging from 1 to 100 μm s−1. Serially increasing the growth velocity within this range results in a graded microstructural transition from fully columnar, albeit segregated, copper dendrites in a lead matrix to one consisting only of equiaxed grains. The imposed velocity necessary to effect fully equiaxed growth is found to drop rapidly as the volume fraction of copper is decreased. Factors which complicate the controlled, directional solidification of these alloys are discussed and the experimental results are interpreted in view of, and seen to be in qualitative agreement with, Hunt’s theory on the transition from columnar to equiaxed growth of dendrites. More... »

PAGES

1807-1815

References to SciGraph publications

  • 1973-11. The dendrite-to-composite transition in off-eutectic Sn-Pb alloys in METALLURGICAL AND MATERIALS TRANSACTIONS B
  • 1988-11. Directional solidification of lead-copper immiscible alloys in a cyclic gravity environment in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1987-06-01. Growth of interdendritic eutectic in directionally solidified Al-Si alloys in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1988-11. Directional solidification of Cu- Pb and Bi- Ga monotectic alloys under normal gravity and during parabolic flight in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1985-10. Cellular and dendritic growth: Part I. Experiment in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1973-12. Silicon- and germanium-based eutectics in JOURNAL OF MATERIALS SCIENCE
  • 1984-06-01. Interdendritic Spacing: Part II. A Comparison of Theory and Experiment in METALLURGICAL AND MATERIALS TRANSACTIONS A
  • 1986-06. The effect of convection on the dendrite to eutectic transition 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
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    http://scigraph.springernature.com/pub.10.1007/bf02804373

    DOI

    http://dx.doi.org/10.1007/bf02804373

    DIMENSIONS

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