An evaluation of primary dendrite trunk diameters in directionally solidified Al-Si alloys

S. N. Tewari, R. N. Grugel, David R Poirier

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The primary dendrite trunk diameters of Al-Si alloys that were directionally solidified over a range of processing conditions have been evaluated. The empirical data are analyzed with a model that is an extension of one used to describe the ripening of dendrite arms. The analysis, based primarily on an assessment of secondary dendrite arm dissolution in the mushy zone, fits well with the experimental data. It is suggested that the primary dendrite trunk diameter is a useful metric that correlates well with the actual solidification processing parameters, and complements the conventionally used primary, secondary, and tertiary arm spacings.

Original languageEnglish (US)
Pages (from-to)4758-4761
Number of pages4
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume45
Issue number11
DOIs
StatePublished - 2014

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Dendrites (metallography)
dendrites
evaluation
Processing
Solidification
Dissolution
mushy zones
complement
solidification
dissolving
spacing

ASJC Scopus subject areas

  • Metals and Alloys
  • Mechanics of Materials
  • Condensed Matter Physics

Cite this

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abstract = "The primary dendrite trunk diameters of Al-Si alloys that were directionally solidified over a range of processing conditions have been evaluated. The empirical data are analyzed with a model that is an extension of one used to describe the ripening of dendrite arms. The analysis, based primarily on an assessment of secondary dendrite arm dissolution in the mushy zone, fits well with the experimental data. It is suggested that the primary dendrite trunk diameter is a useful metric that correlates well with the actual solidification processing parameters, and complements the conventionally used primary, secondary, and tertiary arm spacings.",
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AU - Tewari, S. N.

AU - Grugel, R. N.

AU - Poirier, David R

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AB - The primary dendrite trunk diameters of Al-Si alloys that were directionally solidified over a range of processing conditions have been evaluated. The empirical data are analyzed with a model that is an extension of one used to describe the ripening of dendrite arms. The analysis, based primarily on an assessment of secondary dendrite arm dissolution in the mushy zone, fits well with the experimental data. It is suggested that the primary dendrite trunk diameter is a useful metric that correlates well with the actual solidification processing parameters, and complements the conventionally used primary, secondary, and tertiary arm spacings.

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