Skip to main content
SpringerLink
Log in

Chromium partitioning during isothermal transformation of a eutectoid steel

  • Published:
Metallurgical Transactions A Aims and scope Submit manuscript

Abstract

Partitioning of chromium between ferrite and cementite during the isothermal decomposition of austenite to pearlitic or pearlitic/bainitic decomposition products has been studied in a 1.4 wt pct Cr eutectoid steel using analytical electron microscopy on two-stage extraction replicas. Chromium was observed to segregate preferentially to cementite at the pearlite reaction front for temperatures in the range 730 to 550 °C. Although the extent of partitioning decreased with decreasing reaction temperature, a no-partition temperature could not be identified for the steel. It is clear that previous studies on thin foils have underestimated the temperature range over which partitioning of chromium can occur. At high reaction temperatures measured values of pearlite growth rates were found to be in excellent agreement with those calculated, using the assumption that phase boundary diffusion of chromium was rate controlling. At lower reaction temperatures models based on volume diffusion of carbon and on phase boundary diffusion of chromium both gave reasonable predictions of measured growth rates. However, it seems likely that solute drag effects influence pearlite growth at temperatures in the austenite bay region which the chromium addition produces in the T.T.T. diagram. Measurements made on upper bainite which co-existed with pearlite following transformation at 500 and 550 °C showed that preferential partitioning of chromium to cementite did not occur during this reaction.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Log in via an institution

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Institutional subscriptions

Similar content being viewed by others

References

  1. N. A. Razik, G. W. Lorimer and N. Ridley.Metall. Trans. A, 1976, vol. 7A, pp. 209–14. 2. J. W. Cahn and W. C. Hagel: Decomposition of Austenite by Diffusional Processes, W. F. Zackay and H. I. Aaronson, eds., pp. 131-96, Interscience Publishers, NY, 1962.

    CAS  Google Scholar 

  2. S. A. Al-Salman, G. W. Lorimer and N. Ridley:Metall. Trans. A, 1979, vol. 10A, pp. 1703–09.

    CAS  Google Scholar 

  3. D. Brown and N. Ridley:J. Iron Steel Inst., 1969, vol. 207, pp. 1232–40.

    CAS  Google Scholar 

  4. G. Cliff and G. W. Lorimer:J. Microsc, 1975, vol. 103, pp. 203–07.

    Google Scholar 

  5. J. I. Goldstein, J. L. Costley, G. W. Lorimer and S. J. B. Reed:Proceedings of the Workshop on Analytical Electron Microscopy, SEM 1977, O. Johari, ed., vol. 1, pp. 315–29, IITRI, Chicago, IL.

    Google Scholar 

  6. J. Philibert and R. Tixier:Physical Aspects of Electron Microscopy and Microbeam Analysis, B. Siegel and D. R. Beaman, eds., pp. 333–53, John Wiley, London, 1975.

    Google Scholar 

  7. C. Nockolds, M. J. Nasir, G. Cliff and G. W. Lorimer:Developments in Electron Microscopy and Analysis, 1979, T. Mulvey, ed., pp. 417–20, Institute of Physics, London, 1980.

    Google Scholar 

  8. R. C. Sharma, G. R. Purdy and J. S. Kirkaldy:Metall. Trans. A, 1979, vol. 10A, pp. 1129–39.

    CAS  Google Scholar 

  9. Ibid, pp. 1119–27.

    CAS  Google Scholar 

  10. B. Uhrenius:Hardenability Concepts with Applications to Steel, D. V. Doane and J. S. Kirkaldy, eds., pp. 28-51, AIME, 1978.

  11. M. A. Grossman:Trans. AIME, 1942, vol. 150, pp. 227–55.

    Google Scholar 

  12. E. C. Bain and H. W. Paxton:Alloying Elements in Steel, p. 112, Metals Park, OH (ASM), 1966.

    Google Scholar 

  13. K. W. Andrews:J. Iron Steel Inst., 1965, vol. 203, pp. 721–27.

    CAS  Google Scholar 

  14. R. A. Grange:Met. Prog., 1961, vol. 79, pp. 73–75.

    CAS  Google Scholar 

  15. C. Zener:Trans. AIME, 1946, vol. 167, pp. 550–83.

    Google Scholar 

  16. K. R. Kinsman and H. I. Aaronson:Transformation and Hardenability in Steels, pp. 39–53, Climax Molybdenum Co., Ann Arbor, MI, 1967.

    Google Scholar 

  17. M. Hillert:The Mechanism of Phase Transformations in Crystalline Solids, pp. 231–47, Institute of Metals, London, 1969.

    Google Scholar 

  18. R. Sharma and G. R. Purdy:Metall. Trans., 1973, vol. 4, pp. 2303–11.

    CAS  Google Scholar 

  19. H. Jolivet:J. Iron Steel Inst., 1939, vol. 140, pp. 95–114.

    Google Scholar 

  20. M. Hillert:Decomposition of Austenite by Diffusional Processes, W. F. Zackay and H. I. Aaronson, eds., pp. 197–237, Interscience Publishers, NY, 1962.

    Google Scholar 

  21. A. Schrader:Arch. Eisenhuttenw., 1954, vol. 25, pp. 465–76.

    CAS  Google Scholar 

  22. A. Hultgren:Kungl. Ver. Akad. Handl., 1953, vol. 4, no. 3, pp. 1–47.

    Google Scholar 

  23. P. R. Williams, M. K. Miller, P. A. Beavan and G. D. W. Smith:Phase Transformations, pp. II 98–100, Institution of Metallurgists, London, 1979.

    Google Scholar 

  24. M. Hillert:Jernkohtorets. Ann., 1957, vol. 141, pp. 757–89.

    CAS  Google Scholar 

  25. M. P. Puls and J. S. Kirkaldy:Metall. Trans., 1972, vol. 3, pp. 2777–96.

    CAS  Google Scholar 

  26. H. Stuart and N. Ridley:J. Iron Steel Inst., 1966, vol. 204, pp. 711–17.

    Google Scholar 

  27. J. Fridberg, L. E. Torndahl and M. Hillert:Jernkonterets Ann., 1969, vol. 153, pp. 263–74.

    CAS  Google Scholar 

  28. C. Wells, W. Batz and R. F. Mehl:Trans. AIME, 1950, vol. 16, pp. 553–60.

    Google Scholar 

  29. D. Cheetham and N. Ridley:J. Iron Steel Inst., 1973, vol. 211, pp. 648–52.

    CAS  Google Scholar 

  30. R. F. Hehemann, K. R. Kinsman and H. I. Aaronson:Metall. Trans., 1970, vol. 3, pp. 1077–93.

    Google Scholar 

  31. H. I. Aaronson and H. A. Domian:Trans. TMS-AIME, 1966, vol. 236, pp. 781–96.

    CAS  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. Mather and Platt Limited, M10 6BA, Manchester, England

    John Chance (Metallurgist)

  2. Metallurgy Department, Joint University of Manchester/UMIST, Grosvenor Street, MI 7HS, Manchester, England

    N. Ridley (Senior Lecturer)

Authors
  1. John Chance
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. N. Ridley
    View author publications

    You can also search for this author in PubMed Google Scholar

Additional information

Formerly Graduate Student, University of Manchester

Rights and permissions

Reprints and permissions

About this article

Cite this article

Chance, J., Ridley, N. Chromium partitioning during isothermal transformation of a eutectoid steel. Metall Trans A 12, 1205–1213 (1981). https://doi.org/10.1007/BF02642334

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/BF02642334

Keywords

Search

Navigation