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Centerline Depletion in Direct-Chill Cast Aluminum Alloys: The Avalanche Effect and Its Consequence for Turbulent Jet Casting

Abstract

Avalanche dynamics of sedimenting grains in direct-chill casting of aluminum ingots is investigated as a primary driving force for centerline segregation. An analytical model predicting the importance of avalanche events as a function of casting parameters is proposed and validated with prior art results. New experimental results investigating the transient and steady-state centerline segregation of DC casting with a turbulent jet are reported.

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Acknowledgment

We would like to thank the Novelis Solatens Technology Center for their invaluable assistance in completing this work.

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Correspondence to Antoine Allanore.

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Manuscript submitted May 7, 2016.

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Wagstaff, S.R., Allanore, A. Centerline Depletion in Direct-Chill Cast Aluminum Alloys: The Avalanche Effect and Its Consequence for Turbulent Jet Casting. Metall Mater Trans B 47, 3139–3143 (2016). https://doi.org/10.1007/s11663-016-0756-0

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  • DOI: https://doi.org/10.1007/s11663-016-0756-0

Keywords

  • Casting Speed
  • Static Angle
  • Avalanche Event
  • Centerline Segregation
  • Avalanche Dynamic