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Homogeneous formation of epsilon carbides within the austenite during the isothermal transformation of a ductile iron at 410 °C

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Abstract

The transformation of a ductile iron at 410 °C for different times, after austenitization for 30 minutes at 900 °C, is analyzed in detail. Upper bainite and a high volume fraction of austenite are formed for intermediate annealing times. A certain amount of martensite is observed after quenching not only for short transformation times but also for intermediate times. The formation of the martensite on cooling after intermediate transformation times is due to the decrease in carbon concentration of the retained austenite because of the homogeneous precipitation of epsilon carbides within. This homogeneous precipitation of epsilon carbide inside austenite is unambiguously observed. The epsilon carbide, pre-precipitated in austenite, which transforms to martensite on cooling, continues growing in the martensite after transformation. For long times of austempering at 410 °C, some complex large carbides or silicocarbides are formed, probably from the epsilon carbide, which result in the total decomposition of austenite.

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References

  1. H.K.D.H. Bhadeshia:Bainite in Steels, Institute of Metals, London, 1992.

    Google Scholar 

  2. J. Deliry:Mem. Sci. Rev. Metall., 1965, vol. 62, pp. 527–50.

    CAS  Google Scholar 

  3. J. Pomey:Mem. Sci. Rev. Metall., 1966, vol. 63, pp. 507–32.

    Google Scholar 

  4. R. Lehouiller, G. Begin, and A. Dubé:Metall. Trans., 1971, vol. 2, pp. 2645–53.

    Article  Google Scholar 

  5. H.K.D.H. Bhadeshia and D.V. Edmonds:Metall. Trans. A, 1979, vol. 10A, pp. 895–907.

    CAS  Google Scholar 

  6. B.P.J. Sandvik:Metall. Trans. A, 1982, vol. 13A, pp. 777–87.

    Google Scholar 

  7. J.M. Schissler, J. Arnould, and G. Metauer:Mem. Sci. Rev. Metall., 1975, vol. 6, pp. 779–93.

    Google Scholar 

  8. B.P.J. Sandvik:Metall. Trans. A, 1982, vol. 13A, pp. 789–800.

    Google Scholar 

  9. V. Franetovic, M.M. Shea, and E.F. Ryntz:Mater. Sci. Eng., 1987, vol. 96, pp. 231–45.

    Article  CAS  Google Scholar 

  10. J. Vuorinen:The Strain Hardening of Austempered Spheroidal Graphite Cast Iron, Diss. 48F, Technical Research Centre of Finland, Espoo, Finland, 1981.

    Google Scholar 

  11. K.A. Taylor, G.B. Olson, M. Cohen, and J.B. Vander Sande:Metall. Trans. A, 1989, vol. 20A, pp. 2749–65.

    CAS  Google Scholar 

  12. R. Padmanabhan and W.E. Wood:Mater. Sci. Eng., 1984, vol. 65, pp. 289–97.

    Article  CAS  Google Scholar 

  13. S. Murphy and J.A. Whiteman:Metall. Trans., 1970, vol. 1, pp. 843–48.

    CAS  Google Scholar 

  14. M.G.H. Wells:Acta Metall., 1964, vol. 12, pp. 389–99.

    Article  CAS  Google Scholar 

  15. J.-M.R. Génin:Metall. Trans. A, 1988, vol. 19A, pp. 2901–09.

    Google Scholar 

  16. K.A. Taylor, L. Chang, G.B. Olson, G.D.W. Smith, M. Cohen, and S.B. Vander Sande:Metall. Trans. A, 1989, vol. 20A, pp. 2717–37.

    CAS  Google Scholar 

  17. S.J. Matas and R.F. Heheman:Trans. TMS-A1ME, 1961, vol. 221, pp. 179–85.

    CAS  Google Scholar 

  18. D.-H. Huang and G. Thomas:Metall. Trans. A, 1977, vol. 8A, pp. 1661–74.

    CAS  Google Scholar 

  19. G.Y. Lai:Metall. Trans. A, 1975, vol. 6A, pp. 1469–71.

    CAS  Google Scholar 

  20. W.J. Dubensky and K.R. Rundman:Trans. Am. Foundrymen’s Soc, 1985, vol. 93, pp. 389–94.

    CAS  Google Scholar 

  21. K.H. Jack:J. Iron Steel Inst., 1951, vol. 169, pp. 26–36.

    CAS  Google Scholar 

  22. J. Aranzabal, I. Gutierrez, J.M. Rodriguez-Ibabe, and J.J. Urcola:Mater. Sci. Technol., 1992, vol. 8, pp. 263–73.

    CAS  Google Scholar 

  23. J. Aranzabal, I. Gutierrez, J.M. Rodriguez-Ibabe, and J.J. Urcola: inReliability and Structural Integrity of Advanced Materials, ECF9, S. Sedmak, A. Sedmak, and D. Ruzic, eds., Engineering Materials Advisory Services, Ltd., Warley, West Midlands, United Kingdom, 1992, vol. 1, pp. 81–86.

    Google Scholar 

  24. I.C.H. Hughes:Ductile Iron Metals Handbook, 9th ed., ASM INTERNATIONAL, Metals Park, OH, 1988, vol. 15, pp. 647–66.

    Google Scholar 

  25. B.D. Cullity:Elements of X-Ray Diffraction, Addison-Wesley Publishing Company, Inc., Reading, MA, 1978.

    Google Scholar 

  26. J. Aranzabal, I. Gutierrez, and J.J. Urcola:Mater. Sci. Technol., 1994, vol. 10, pp. 728–37.

    CAS  Google Scholar 

  27. G.V. Kurdjumov and G. Sachs:Z. Phys., 1930, vol. 64, p. 325.

    Article  Google Scholar 

  28. T.N. Rouns and K.B. Rundman:Trans. Am. Foundrymen’s Soc., 1987, vol. 95, pp. 851–74.

    CAS  Google Scholar 

  29. Y. Hirotsu and S. Nagakura:Acta Metall., 1972, vol. 20, pp. 645–55.

    Article  CAS  Google Scholar 

  30. C. Dominguez-Rios: Master’s Thesis, E.S.I.I., University de Navarra, San Sebástian, 1988.

    Google Scholar 

  31. I. Gutiérrez, J.J. Urcola, J.M. Bilbao, and L.M. Villar:Mater. Sci. Technol., 1991, vol. 7, pp. 761–69.

    Google Scholar 

  32. B. López, I. Gutiérrez, and J.J. Urcola:Mater. Characterization, 1992, vol. 28, pp. 49–59.

    Article  Google Scholar 

  33. B. Alemán, I. Gutiérrez, and J.J. Urcola:Mater. Sci. Technol., 1993, vol. 9, pp. 633–41.

    Google Scholar 

  34. I. Tamura:New Aspects of Martensitic Transformation, Proc. 1st JIM Int. Symp., Suppl. toTrans. JIM, 1976, vol. 17, pp. 59–68.

    Google Scholar 

  35. W.C. Leslie:The Physical Metallurgy of Steels, McGraw-Hill, New York, NY, 1982, p. 140.

    Google Scholar 

  36. H.K.D.H. Bhadeshia and J.W. Christian:Metall. Trans. A, 1990, vol. 21A, pp. 767–97.

    CAS  Google Scholar 

  37. I.-Lin Cheng and G. Thomas:Metall. Trans., 1972, vol. 3, pp. 503–16.

    CAS  Google Scholar 

  38. R.L. Patterson and C.M. Wayman:Acta Metall., 1966, vol. 14, pp. 347–69.

    Article  CAS  Google Scholar 

  39. M. Doi and Z. Nishiyama:Nippon, Kiugoku Gakkai-Si, 1953, vol. 17, p. 487.

    Google Scholar 

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Authors and Affiliations

  1. Department of Materials, CEIT, San Sebastian, Spain

    I. Gutierrez (Senior Researcher, Lecturer), F. Castro (Principal Researcher, Lecturer) & J. J. Urcola (Head, Professor)

  2. E.S.I.I., 20009, San Sebastian, Spain

    I. Gutierrez (Senior Researcher, Lecturer), F. Castro (Principal Researcher, Lecturer) & J. J. Urcola (Head, Professor)

  3. INASMET, San Sebastian, Spain

    J. Aranzabal (Senior Researcher)

Authors
  1. I. Gutierrez
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  2. J. Aranzabal
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  3. F. Castro
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  4. J. J. Urcola
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Gutierrez, I., Aranzabal, J., Castro, F. et al. Homogeneous formation of epsilon carbides within the austenite during the isothermal transformation of a ductile iron at 410 °C. Metall Mater Trans A 26, 1045–1060 (1995). https://doi.org/10.1007/BF02670600

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