Skip to main content
SpringerLink
Log in

Modeling M6C precipitation in niobium-alloyed ferritic stainless steel

  • Published:
Metallurgical and Materials Transactions A Aims and scope Submit manuscript

Abstract

Niobium is used as an important alloying element in the design of heat-resistant stainless steels for automotive exhaust systems. When in solid solution, the niobium improves both the high-temperature strength and the resistance to thermal fatigue life. However, it also forms coarse Fe3Nb3C carbides during service at elevated temperatures, making it important to understand the kinetics of carbide precipitation and coarsening. In the present work, the kinetics of M6C precipitation in ferrite have been modeled, taking into account the multicomponent nature of the diffusion process while at the same time allowing for capillarity effects. The lack of appropriate thermodynamic data has been dealt with using a solubility product based on new experiments on a 19Cr-0.8Nb mass pct steel.

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. Fujita, K. Ohmura, M. Kikuchi, T. Suzuki, S. Funaki, and I. Hiroshige: Scripta Mater., 1996, vol. 35, pp. 705–10.

    Article  CAS  Google Scholar 

  2. N. Fujita, K. Ohmura, E. Sato, and A. Yamamoto: Nippon Steel Tech. Rep., 1996, vol. 71, pp. 25–30.

    Google Scholar 

  3. M.F. Ashby and R. Ebeling: Trans. TMS-AIME, 1966, vol. 236, pp. 1396–1404.

    CAS  Google Scholar 

  4. D. Turnbull and J.C. Fisher: J. Chem. Phys., 1949, vol. 17, pp. 71–73.

    Article  CAS  Google Scholar 

  5. J.W. Christian: Theory of Transformations in Metals and Alloys, 2nd ed. Pergamon Press, Oxford, United Kingdom, 1975, part I.

    Google Scholar 

  6. D.E. Coates: Metall. Trans., 1973, vol. 4, pp. 2313–25.

    CAS  Google Scholar 

  7. J.S. Kirkaldy: Can. J. Phys., 1958, vol. 36, pp. 907–16.

    CAS  Google Scholar 

  8. J. Fridberg, L.-E. Torndahl, and M. Hillert: Jernkotorets Ann., 1969, vol. 153, pp. 263–76.

    CAS  Google Scholar 

  9. R. Wagner and R. Kampmann: in Material Science and Technology, R.W. Cahn, P. Haasen, and E.J. Kramer, eds., VCH, New York, NY, 1991, vol. 5, pp. 272–93.

    Google Scholar 

  10. I.M. Lifshitz and V.V. Slyozov: J. Phys. Chem. Solids, 1961, vol. 19, pp. 35–50.

    Article  Google Scholar 

Download references

Author information

Authors and Affiliations

  1. the Steel Products Lab.-1, Nippon Steel Corporation, 293-8511, Futtsu, Japan

    Nobuhiro Fujita (Senior Researcher) & Masao Kikuchi (Chief Researcher)

  2. the Department of Materials Science and Metallurgy, University of Cambridge, CB2 3QZ, Cambridge, United Kingdom

    H. K. D. H. Bhadeshia (Professor)

Authors
  1. Nobuhiro Fujita
    View author publications

    You can also search for this author in PubMed Google Scholar

  2. Masao Kikuchi
    View author publications

    You can also search for this author in PubMed Google Scholar

  3. H. K. D. H. Bhadeshia
    View author publications

    You can also search for this author in PubMed Google Scholar

Rights and permissions

Reprints and permissions

About this article

Cite this article

Fujita, N., Kikuchi, M. & Bhadeshia, H.K.D.H. Modeling M6C precipitation in niobium-alloyed ferritic stainless steel. Metall Mater Trans A 33, 3339–3347 (2002). https://doi.org/10.1007/s11661-002-0322-z

Download citation

  • Received:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11661-002-0322-z

Keywords

Search

Navigation