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Discontinuous cellular precipitation in a high-refractory nickel-base superalloy

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Abstract

A discontinuous precipitation reaction has been investigated in a high-refractory content nickel-base alloy. The reaction transforms the two-phase γ-γ′ parent microstructure into a three-phase cellular structure with a γ′ matrix containing Re-rich P-phase and agglomerated γ lamellae. The reaction has been studied in polycrystalline material and in bicrystals with varying degrees of boundary misorientation at temperatures in the range of T/T m =0.78 to 0.85. The early stages of the reaction are characterized by heterogeneous nucleation of P-phase precipitates and migration of the grain boundary. At low-angle, near-tilt boundaries misoriented by less than 10 deg, nucleation of P-phase particles was observed, but the cellular reaction did not occur, due to limited boundary mobility and diffusivity. The high degree of supersaturation of Re and W in the initial γ-γ′ alloy appears to be the primary driving force for the reaction. Small amounts of creep deformation did not significantly influence the extent of the transformation. The diffusivity of Re associated with the moving boundary was calculated to be 5×10−8 cm2 s−1 at 1093 °C, which is approximately four orders of magnitude greater than the bulk lattice diffusivity of tungsten.

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References

  1. C.S. Smith: Trans. ASM, 1953, vol. 45, pp. 533–75.

    CAS  Google Scholar 

  2. D. Turnbull: Acta Metall., 1955, vol. 3, pp. 55–62.

    Article  CAS  Google Scholar 

  3. J.W. Cahn: Acta Metall., 1959, vol. 7, pp. 18–28.

    Article  CAS  Google Scholar 

  4. K.N. Tu and D. Turnbull: Acta Metall., 1967, vol. 15, pp. 1317–23.

    Article  CAS  Google Scholar 

  5. D.B. Williams and E.P. Butler: Int. Met. Rev., 1981, vol. 3, pp. 153–83.

    Google Scholar 

  6. E. Hornbogen: Metall. Trans., 1972, vol. 3, pp. 2717–27.

    CAS  Google Scholar 

  7. M.S. Sulonen: Acta Metall., 1964, vol. 12, pp. 749–53.

    Article  Google Scholar 

  8. Y.H. Chung, M.C. Shin, and D.Y. Yoon: Acta Metall. Mater., 1992, vol. 40, pp. 2177–84.

    Article  CAS  Google Scholar 

  9. E.W. Ross: J. Met., 1967, vol. 19, pp. 12–18.

    CAS  Google Scholar 

  10. S.T. Wlodek: Trans. ASM, 1964, vol. 57, pp. 110–19.

    CAS  Google Scholar 

  11. J.R. Mihalisin, C.G. Bieber, and R.T. Grant: Trans. AIME, 1968, vol. 242, pp. 2399–2414.

    CAS  Google Scholar 

  12. R. Darolia, D.F. Lahrman, R.D. Field, and R. Sisson: Superalloys 1988, TMS, Warrendale, PA, 1988, pp. 255–64.

    Google Scholar 

  13. A.F. Giamei and D.L. Anton: Metall. Trans. A, 1985, vol. 16A, pp. 1997–2005.

    CAS  Google Scholar 

  14. D.H. Duhl: Superalloys, Supercomposites and Superceramics, Academic Press, New York, NY, 1989, pp. 149–81.

    Google Scholar 

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

    Google Scholar 

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

    Article  CAS  Google Scholar 

  17. W.S. Walston, J.C. Schaeffer, and W.H. Murphy: Superalloys 1996, TMS, Warrendale, PA, 1996, pp. 9–18.

    Google Scholar 

  18. T.M. Pollock and A.S. Argon: Acta Metall. Mater., 1994, vol. 42, pp. 1859–74.

    Article  CAS  Google Scholar 

  19. H.B. Aaron and H.I. Aaronson: Acta Metall., 1968, vol. 16, pp. 789–98.

    Article  CAS  Google Scholar 

  20. D.B. Williams and J.W. Edington: Acta Metall., 1976, vol. 24, pp. 323–32.

    Article  Google Scholar 

  21. R.A. Swalin and A. Martin: J. Met., 1956, pp. 567–72.

  22. H.I. Aaronson and Y.C. Liu: Scripta Metall., 1968, vol. 2, pp. 1–7.

    Article  CAS  Google Scholar 

  23. B.E. Sundquist: Metall. Trans., 1973, vol. 4, pp. 1919–34.

    CAS  Google Scholar 

  24. M. Hillert: Acta Metall., 1982, vol. 30, pp. 1689–97.

    Article  CAS  Google Scholar 

  25. H.I. Aaronson and H.B. Aaron: Metall. Trans., 1972, vol. 3, pp. 2743–56.

    CAS  Google Scholar 

  26. R.A. Fournelle and J.B. Clark: Metall. Trans., 1972, vol. 3, pp. 2757–67.

    CAS  Google Scholar 

  27. S.F. Baumann, J. Michael, and D.B. Williams: Acta Metall., 1981, vol. 29, pp. 1343–55.

    Article  CAS  Google Scholar 

  28. T.M. Pollock and A.S. Argon: Superalloys 1988, TMS, Warrendale, PA, 1988, pp. 285–94.

    Google Scholar 

  29. T.M. Pollock and A.S. Argon: Acta Metall. Mater., 1992, vol. 1, pp. 1–30.

    Google Scholar 

  30. C. Marsh and H. Chen: Acta Metall. Mater., 1990, vol. 38, pp. 2887–94.

    Google Scholar 

  31. R.D. Field, T.M. Pollock, and W.H. Murphy: Superalloys 1992, TMS, Warrendale, PA, 1992, pp. 557–66.

    Google Scholar 

  32. J.R. Dryden and G.R. Purdy: Acta Metall., 1990, vol. 38, pp. 1255–61.

    Article  CAS  Google Scholar 

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Author notes

  1. J. D. Nystrom (Graduate Research Assistant, Graduate Student)

    Present address: the Department of Materials Science and Engineering, Carnegie Mellon University, USA

  2. A. Garg (Research Associate, Research Scientist)

    Present address: the Materials Science and Engineering Department, Carnegie Mellon University, USA

Authors and Affiliations

  1. Massachusetts Institute of Technology, 02139, Cambridge, MA

    J. D. Nystrom (Graduate Research Assistant, Graduate Student)

  2. the Department of Materials Science and Engineering, Carnegie Mellon University, 15213, Pittsburgh, PA

    T. M. Pollock (Associate Professor)

  3. the Engineering Materials and Technologies Laboratory, General Electric Aircraft Engines, 45215, Cincinnati, OH

    W. H. Murphy (Research Engineer)

  4. Nasa-Lewis Research Center, 44135, Cleveland, OH

    A. Garg (Research Associate, Research Scientist)

Authors
  1. J. D. Nystrom
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  2. T. M. Pollock
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  3. W. H. Murphy
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  4. A. Garg
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Nystrom, J.D., Pollock, T.M., Murphy, W.H. et al. Discontinuous cellular precipitation in a high-refractory nickel-base superalloy. Metall Mater Trans A 28, 2443–2452 (1997). https://doi.org/10.1007/s11661-997-0001-1

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  • DOI: https://doi.org/10.1007/s11661-997-0001-1

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