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Stabilization of thermosolutal convective instabilities in Ni-based single-crystal superalloys: Carbon additions and freckle formation

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Abstract

The effect of carbon additions on the solidification characteristics of single-crystal Ni-based superalloys has been studied over a range of composition with large variations in Re, W, and Ta. Under constant processing conditions, nominally similar experimental alloys containing additions of 0.1 wt pct C exhibited a decreased tendency to develop grain defects, such as freckle chains. The carbon additions resulted in the formation of Ta-rich MC carbides with three distinct morphologies: blocky, nodular, and script. These carbides all precipitate near the liquidus temperature of the alloy. Intentional carbon additions also affected the segregation behavior of the constituent elements. Comparison of experimentally measured distribution coefficients assessed via application of a Scheil-type analysis revealed reduced segregation of Re, W, and Ta in experimental single-crystal alloys containing carbon. The mechanisms by which carbon additions influence freckle formation are considered.

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References

  1. S.M. Copley, A.F. Giamei, S.M. Johnson, and M.F. Hornbecker: Metall. Trans., 1970, vol. 1, pp. 2193–2204.

    CAS  Google Scholar 

  2. T.M. Pollock, W.H. Murphy, E.H. Goldman, D.L. Uram, and J.S. Tu: in Superalloys 1992, S.D. Antolovich, R.W. Stusrud, R.A. MacKay, D.L. Anton, T. Khan, R.D. Kissinger, and D.L. Klarstrom, eds., TMS, Warrendale, PA, 1992, pp. 125–34.

    Google Scholar 

  3. T.M. Pollock and W.H. Murphy: Metall. Mater. Trans., 1996, vol. 27A, pp. 1081–94.

    Google Scholar 

  4. A.F. Giamei and B.H. Kear: Metall. Trans., 1970, vol. 1, pp. 2185–92.

    CAS  Google Scholar 

  5. R. Mehrabian, M.A. Keane, and M.C. Flemings: Metall. Trans., 1970, vol. 1, pp. 3238–41.

    CAS  Google Scholar 

  6. A.K. Sample and A. Hellawell: Metall. Trans. A, 1984, vol. 15A, pp. 2163–73.

    CAS  Google Scholar 

  7. J.R. Sarazin and A. Hellawell: Metall. Trans. A, 1988, vol. 19A, pp. 1861–71.

    CAS  Google Scholar 

  8. M.C. Schneider, J.P. Gu, C. Beckermann, W.J. Boettinger, and U.R. Kattner: Metall. Mater. Trans. A, 1997, vol. 28A, pp. 1517–31.

    CAS  Google Scholar 

  9. F.L. VerSynder: U.S. Patent 3,260,505, 1966.

  10. F.L. VerSynder and M.E. Shank: Mater. Sci. Eng., 1970, vol. 6, pp. 213–47.

    Article  Google Scholar 

  11. K.O. Yu, J.J. Nichols, and M. Robinson: JOM, 1992, vol. 44, vol. 6, pp. 21–25.

    CAS  Google Scholar 

  12. K.O. Yu, J.A. Oti, M. Robinson, and R.G. Carlson: in Superalloys 1992, S.D. Antolovich, R.W. Stustrud, R.A. MacKay, D.L. Anton, T. Khan, R.D. Kissinger, and D.L. Klarstrom, eds., TMS, Warrendale, PA, 1992, pp. 134–44.

    Google Scholar 

  13. J.S. Tu and R.K. Foran: JOM, 1992, vol. 44, vol. 6, pp. 26–28.

    CAS  Google Scholar 

  14. A.L. Purvis, C.R. Hanslits, and R.S. Diehm: JOM, 1994, vol. 46, vol. 1, pp. 38–41.

    CAS  Google Scholar 

  15. P. Auburtin and A. Mitchell: in Liquid Metals Processing, AVS, Santa Fe, NM, 1996, pp. 18–34.

    Google Scholar 

  16. J.D. Hunt: Mater. Sci. Eng., 1984, vol. 65, pp. 75–83.

    Article  CAS  Google Scholar 

  17. T.M. Pollock: Mater. Sci. Eng., 1995, vol. B32, pp. 255–66.

    Article  CAS  Google Scholar 

  18. J.P. Gu, C. Beckermann, and A.F. Giamei: Metall. Mater. Trans. A, 1997, vol. 28A, pp. 1533–42.

    CAS  Google Scholar 

  19. M. Meyerter Vehn, D. Dedecke, U. Paul, and P.R. Sahm: in Superalloys 1996, R.D. Kissinger, D.J. Deye, A.L. Anton, A.D. Cetel, M.V. Nathal, T.M. Pollock, and D.A. Woodford, eds., TMS, Seven Springs, PA, 1996, pp. 471–79.

    Google Scholar 

  20. S.D. Felicelli, D.R. Poirier, and J.C. Heinrich: J. Cryst. Growth, 1997, vol. 177, pp. 145–61.

    Article  CAS  Google Scholar 

  21. S.R. Corriell, M.R. Cordes, W.J. Boettinger, and R.F. Sekerka: J. Cryst. Growth, 1980, vol. 49 (13).

  22. C.T. Sims, N.S. Stoloff, and W.C. Hagel: Superalloys II, John Wiley & Sons, New York, NY, 1986.

    Google Scholar 

  23. J.K. Tien and T. Caulfield: Superalloys, Supercomposites and Superceramics, Academic Press, Inc., New York, NY, 1988.

    Google Scholar 

  24. M. Gell, D.N. Duhl, and A.F. Giamei: in Superalloys, J.K. Tien, S.T. Wlodek, H. Morrow, M. Gell, and G.E. Maurer, eds., ASM, Seven Springs, PA, 1980, pp. 205–14.

    Google Scholar 

  25. K. Harris and G.L. Erickson: U.S. Patent 4,582,548, 1986.

  26. E.W. Ross, C.S. Wukusick, and W.T. King: U.S. Patent 5,399,313, 1995.

  27. J.R. Mihalisin, J. Corrigan, R.J. Baker, E.L. Leonard, and J.L. Vandersluis: U.S. Patent 5,549,765, 1996.

    Google Scholar 

  28. M.J. Donachie: J. Testing Eval., 1978, vol. 6 (3), pp. 189–915.

    Article  CAS  Google Scholar 

  29. M.N. Gungor: Metall. Trans., 1989, vol. 20A, pp. 2529–33.

    CAS  Google Scholar 

  30. S.C. Huang, L. Peluso, and D. Backman: in Solidification 1999, W.H.R. Hofmeister, J.R. Singh, N.B. Singh, Marsh, S.P., and Vorhees, P.W., eds., TMS, Warrendale, PA, 1999, pp. 163–72.

    Google Scholar 

  31. L. Nastac, L.S. Chou, and Y. Pang: in Liquid Metals Processing, AVS, Santa Fe, NM, 1999, pp. 207–23.

    Google Scholar 

  32. R. Sellamuthu and A.F. Giamei: Metall. Trans. A, 1986, vol. 17A, pp. 419–28.

    CAS  Google Scholar 

  33. W.A. Tiller: The Science of Crystallization, Cambridge University Press, Cambridge, United Kingdom, 1991.

    Google Scholar 

  34. P.K. Sung, D.R. Poirier, and E. McBride: Mater. Sci. Eng., 1997, vol. A231, pp. 189–97.

    CAS  Google Scholar 

  35. T. Iida and R.I. Guthrie: The Physical Properties of Liquid Metals, Clarendon Press, Oxford, United Kingdom, 1988, pp. 70–73.

    Google Scholar 

  36. M.R. Jackson: Metall. Trans. A, 1977, vol. 8A, pp. 905–13.

    CAS  Google Scholar 

  37. V.A. Willis and D.G. McCartney: Mater. Sci. Eng., 1991, vol. A145, pp. 223–32.

    Google Scholar 

  38. E. Fras, E. Guzik, W. Kapturckiewicz, and H.F. Lopez: J. Mater. Eng. Performance, 1996, vol. 5 (1), pp. 103–10.

    CAS  Google Scholar 

  39. P.N. Quested and M. McLean: Mater. Sci. Eng., 1984, vol. 65, pp. 171–80.

    Article  CAS  Google Scholar 

  40. A.K. Bhambri, T.Z. Kattamis, and J.E. Morral: Metall. Trans. A, 1975, vol. 6B, pp. 523–37.

    CAS  Google Scholar 

  41. R. Fernandez, J.C. Lecomte, and T.Z. Kattamis: Metall. Trans. A, 1978, vol. 9A, pp. 1381–86.

    CAS  Google Scholar 

  42. R. Elliot: Eutectic Solidification Processing: Crystalline and Glassy Alloys, Butterworth and Co., London, 1983, p. 370.

    Google Scholar 

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Authors and Affiliations

  1. the Department of Materials Science and Engineering, University of Michigan, 48109, Ann Arbor, MI

    S. Tin (Graduate Research Associate) & T. M. Pollock (Professor)

  2. General Electric Aircraft Engines, 45215, Cincinnati, OH

    W. Murphy (Senior Engineer)

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  1. S. Tin
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  2. T. M. Pollock
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  3. W. Murphy
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Tin, S., Pollock, T.M. & Murphy, W. Stabilization of thermosolutal convective instabilities in Ni-based single-crystal superalloys: Carbon additions and freckle formation. Metall Mater Trans A 32, 1743–1753 (2001). https://doi.org/10.1007/s11661-001-0151-5

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  • DOI: https://doi.org/10.1007/s11661-001-0151-5

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