Deformation of Dendrites by Fluid Flow during Rapid Solidification

  1. Prof. J. V. Wood2,
  2. Prof. Dr. L. Schultz3 and
  3. Prof. Dr. D. M. Herlach4
  1. Andrew M. Mullis,
  2. Daniel J. Walker,
  3. Sharon E. Battersby and
  4. Robert F. Cochrane

Published Online: 25 APR 2006

DOI: 10.1002/3527607277.ch21

Materials Development and Processing - Bulk Amorphous Materials, Undercooling and Powder Metallurgy, Volume 8

Materials Development and Processing - Bulk Amorphous Materials, Undercooling and Powder Metallurgy, Volume 8

How to Cite

Mullis, A. M., Walker, D. J., Battersby, S. E. and Cochrane, R. F. (2000) Deformation of Dendrites by Fluid Flow during Rapid Solidification, in Materials Development and Processing - Bulk Amorphous Materials, Undercooling and Powder Metallurgy, Volume 8 (eds J. V. Wood, L. Schultz and D. M. Herlach), Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim, FRG. doi: 10.1002/3527607277.ch21

Editor Information

  1. 2

    University of Nottingham, Division of Materials, Nottingham NG7 2RD, United Kingdom

  2. 3

    Institut für Festkorper- und Werkstofforschung Dresden e.V., Postfach 270016, 01171 Dresden, Germany

  3. 4

    Deutsches Zentrum für Luft- und Raumfahrt e.V., Linder Hohe, 51170 Köln, Germany

Author Information

  1. Department of Materials, University of Leeds, Leeds LS2 9JT, UK

Publication History

  1. Published Online: 25 APR 2006
  2. Published Print: 27 JUN 2000

Book Series:

  1. EUROMAT 99

ISBN Information

Print ISBN: 9783527301935

Online ISBN: 9783527607273

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Keywords:

  • dendrites;
  • deformation of dendrites;
  • fluid flow during rapid solidification

Summary

Mechanical interactions between dendrites and their parent melt are normally considered insignificant. However, during rapid solidification the twin conditions of high flow velocities and very fine dendrites required to produce mechanical damage may exist. A model for the skin stress resulting from flow around a family of realistically shaped dendrites is presented. We find that within a narrow undercooling range about a local minimum in the tip radius, mechanical deformation is likely. Experimental evidence is presented from a Cu-3wt.% Sn alloy undercooled by 73 K which appears to show evidence of a deformed dendritic structure.