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Some New Observations on Freckle Formation in Directionally Solidified Superalloy Components

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To improve the understanding of freckle formation in superalloys, several directional solidification experiments were carried out in a production-scale Bridgman furnace. During the careful inspections of the many cast specimens, several interesting phenomena were observed, indicating new aspects of freckle formation. Accordingly, several new factors influencing the freckle formation, such as the shadow effect, the edge effect, the step effect, and the crystal orientation effect, are proposed. This will contribute to our current understanding of freckle formation and the future development of new measures to minimize freckle defects in directionally solidified components of superalloys.

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References

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

    Article  CAS  Google Scholar 

  2. S.M. Copley, A.F. Giamei, S.M. Johnson, and M.F. Hornbecker: Metall. Trans., 1970, vol. 1, pp. 2193–204.

    Article  CAS  Google Scholar 

  3. P. Auburtin, S.L. Cockcroft, and A. Mitchell: Material for Advanced Power Engineering 1998, Proceedings of the 6 th Liege Conference, Part III, J. Lecomte-Beckers, F. Schubert, and P. Ennis, eds., Uni. De Lieghe European Commission, pp. 1459–68.

  4. S. Tin: Ph.D. Dissertation, University of Michigan, Ann Arbor, MI, 2001.

  5. R.A. Hobbs, S. Tin, and C.M.F. Rae: Metall. Mater. Trans. A, 2005, vol. 36A, pp. 2761–73.

    Article  CAS  Google Scholar 

  6. S. Tin and T.M. Pollock: J. Mater. Sci., 2004, vol. 39, pp. 7199–205.

    Article  CAS  Google Scholar 

  7. S. Tin, T.M. Pollock, and W.T. King: Superalloy 2000, T.M. Pollock, R.D. Kissinger, and R.R. Bowman, eds., TMS, Warrendale, PA, 2000, pp. 201–10.

  8. S.D. Felicelli, J.C. Heinrich, and D.R. Poirier: Metall. Trans. B, 1991, vol. 22B, pp. 847–59.

    Article  CAS  Google Scholar 

  9. M.C. Schneider and C. Beckermann: Metall. Mater. Trans. A, 1995, vol. 16A, pp. 2373–88.

    Article  Google Scholar 

  10. M.C. Schneider and C. Beckermann: ISIJ Int., 1995, vol. 35, p. 665.

    Article  CAS  Google Scholar 

  11. S.D. Felicelli, D.R. Poirior, and J.C. Heinrich: J. Crystal Growth, 1997, vol. 177, pp. 145–61.

    Article  CAS  Google Scholar 

  12. M.C. Schneider, J.P. Gu, C. Beckermann, and U.R. Katterner: Metall. Mater. Trans. B, 1998, vol. 29B, pp. 847–55.

    Google Scholar 

  13. C. Frueh, D.R. Poirior, and S.D. Felicelli: Mater. Sci. Eng. A, 2002, vol. 328, pp. 245–55.

    Article  Google Scholar 

  14. M. Medina, Y. Du Terrail, F. Durand, and Y. Fautrelle: Metall. Mater. Trans. B, 2004, vol. 35B, pp. 743–53.

  15. J. Jain, A. Kumar, and P. Dutta: J. Phys. D: Appl. Phys., 2007, vol. 40, pp. 1150–60.

    Article  CAS  Google Scholar 

  16. R. F. Katz, M. G.Worster: J. Comp. Phys., 2008, vol. 227, pp. 9823–40.

    Article  CAS  Google Scholar 

  17. L. Yuan and P.D. Lee: ISIJ Int., 2010, vol. 50, pp. 1814–18.

    Article  CAS  Google Scholar 

  18. S. Chandrasekhar: Hydrodynamics and Hydromagnetic Stability, Clarendon Press, Oxford, UK, 1961, pp. 9–10.

    Google Scholar 

  19. J.R. Sarazin and A. Hellawell: Adv. Phase Transit., 1987, vol. 10, pp. 101–15.

    Google Scholar 

  20. C. Beckermann, J.P. Gu, and W.J. Boettinger: Metall. Mater. Trans. A, 2000, vol. 31A, pp. 2545–52.

    Article  CAS  Google Scholar 

  21. J.C. Ramirez and C. Beckermann: Metall. Mater. Trans. A, 2003, vol. 34A pp. 1525–35.

  22. S.N. Tewari and R. Tiwari: Metall. Mater. Trans. A, 2003, vol. 34A, pp. 2365–76.

    Article  CAS  Google Scholar 

  23. S.N. Tewari, R. Tiwari, and G. Magadi: Metall. Mater. Trans. A, 2004, vol. 35A, pp. 2927–34.

    Article  CAS  Google Scholar 

  24. Q. Feng, L.J. Carroll, and T.M. Pollock: Metall. Mater. Trans. A, 2006, vol. 37A, pp. 1949–62.

    Article  CAS  Google Scholar 

  25. T.M. Pollock, J. Dibbern, M. Tsunekane, J. Zhu, and A. Suzuki: JOM, 2010, vol. 62, pp. 58–63.

    Article  CAS  Google Scholar 

  26. J. Valdes, P. King, and X. Liu: Metall. Mater. Trans. A, 2010, vol. 41A, pp. 2408–16.

    Article  CAS  Google Scholar 

  27. R. Schadt, I. Wagner, J. Preuhs, and P.R. Sahm: Superalloy 2000, T.M. Pollock, R.D. Kissinger, and R.R. Bowman, eds., TMS, Warrendale, PA, 2000, pp. 211–18.

  28. P. Auburtin: Ph.D. Dissertation, University of British Columbia, Vancouver, B.C., Canada, 1998.

  29. P. Auburtin, T. Wang, S.L. Cockcroft, and A. Mitchell: Metall. Mater. Trans. B, 2000, vol. 31B, pp. 801–11.

    Article  CAS  Google Scholar 

  30. P. Auburtin, S.L. Cockcroft, A. Mitchell, and T. Wang: Superalloy 2000, T.M. Pollock, R.D. Kissinger, and R.R. Bowman, eds., TMS, Warrendale, PA, pp. 255–61.

  31. D. Ma and A. Bührig-Polaczek: Int. J. Cast Metals Res., 2009, vol. 22, pp. 422–29.

    Article  CAS  Google Scholar 

  32. D. Ma and A. Bührig-Polaczek: Int. J. Mater. Res., 2009, vol. 100, pp. 1145 –51.

    Article  CAS  Google Scholar 

  33. L. Li: Ph.D. Dissertation, Auburn University, Auburn, AL, 2002.

  34. D. Ma, M. Mathes, B. Zhou, and A. Bührig-Polaczek: Adv. Mater. Res., 2011, vol. 278, pp.114–19.

    Article  CAS  Google Scholar 

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

    CAS  Google Scholar 

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

    CAS  Google Scholar 

  37. R.N. Grugle and L.N. Brush: JOM, 1997, vol. 49, pp. 26–30.

  38. X. Wang, R.M. Ward, M.H. Jacobs, and M.D. Barratt: Metall. Mater. Trans. A, 2008, vol. 39A, pp. 2981–89.

    Article  CAS  Google Scholar 

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Acknowledgments

This work was supported by the Deutsche Forschungsgemeinschaft (DFG) through Grant BU1072/15-1 and -2. Appreciation is extended to S. Hollad, J. Norminikat, D. Lembrecht, and E. Schaberger-Zimmerman for their assistance in the experiments.

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Authors and Affiliations

  1. Foundry Institute, RWTH University, Aachen, 52072, Germany

    Dexin Ma (Senior Scientist), Qiang Wu (Student) & Andreas Bührig-Polaczek (Professor)

Authors
  1. Dexin Ma
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  2. Qiang Wu
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  3. Andreas Bührig-Polaczek
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Correspondence to Dexin Ma.

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Manuscript submitted May 5, 2011.

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Ma, D., Wu, Q. & Bührig-Polaczek, A. Some New Observations on Freckle Formation in Directionally Solidified Superalloy Components. Metall Mater Trans B 43, 344–353 (2012). https://doi.org/10.1007/s11663-011-9608-0

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