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The influence of acceleration forces on dendritic growth and grain structure

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Abstract

The results of experiments on the tin-15 wt pct lead system are presented, showing the effects on microstructure of solidification in presence of acceleration forces from 10-4 to 5g* for three cooling rates. An increase in the acceleration level is shown to drive fluid flow and cause dendrite remelting, fragmentation, and macrosegregation. The cooling rate impacts the final structure through its control of dendrite arm spacings and permeability to fluid flow. At the low (10-4 g) acceleration, dendrite arm spacings deviated from the predicted relationship to cooling rate. An explanation for this anomaly is given which considers the temperature and concentration gradients in the low-gravity environment.

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References

  1. S. Wojetchowski and B. Chalmers:Trans. TMS-AIME, 1968, vol. 242, p. 690.

    Google Scholar 

  2. G. S. Cole and G. F. Boiling:Trans. TMS-AIME, 1967, vol. 239, p. 1824.

    CAS  Google Scholar 

  3. M. C. Flemings: Materials Society Conference on Solidification Technology in the Foundry & Casthouse; University of Warwick, Coventry, September 1980.

    Google Scholar 

  4. T. Z. Kattamis, J. C. Coughlin, and M.C. Flemings:Trans. TMS-AIME, 1967, vol. 239, p. 1504.

    CAS  Google Scholar 

  5. M. C. Flemings and G. E. Nereo:Trans. TMS-AIME, 1968, vol. 242, p. 40.

    Google Scholar 

  6. N. Streat and F. Weinberg:Metall. Trans., 1974, vol. 5, p. 2539.

    Article  CAS  Google Scholar 

  7. M. H. Johnston and C. S. Griner:Metall. Trans. A, 1977, vol. 8A, p. 77.

    CAS  Google Scholar 

  8. M.H. Johnston, C.S. Griner, R. A. Parr, and S. J. Robertson:J. of Crystal Growth, 1980, vol. 50, p. 831.

    Article  CAS  Google Scholar 

  9. D. J. Allen and J. D. Hunt:Metall. Trans. A, 1976, vol. 7A, p. 767.

    CAS  Google Scholar 

  10. K. P. Young and D. H. Kirkwood:Metall. Trans. A, 1975, vol. 6A, p. 197.

    Google Scholar 

  11. M.H. Johnston and D.H. Baldwin:Metall. Trans., 1974, vol. 5, p. 2395.

    Article  CAS  Google Scholar 

  12. G. S. Cole and G.F. Boiling:Trans. TMS-AIME, 1965, vol. 233, p. 1568.

    CAS  Google Scholar 

  13. R.T. Dehoff and F. N. Rhines:Quantitative Microscopy, McGraw Hill Inc., New York, NY, 1968, p. 102.

    Google Scholar 

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Authors and Affiliations

  1. Marshall Space Flight Center, 35812, AL

    M. H. Johnston (Materials Engineer) & R. A. Parr (Metallurgical Engineer)

Authors
  1. M. H. Johnston
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  2. R. A. Parr
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Johnston, M.H., Parr, R.A. The influence of acceleration forces on dendritic growth and grain structure. Metall Trans B 13, 85–90 (1982). https://doi.org/10.1007/BF02666959

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  • DOI: https://doi.org/10.1007/BF02666959

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