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Journal of Materials Science

, Volume 43, Issue 3, pp 874–882 | Cite as

Computer simulation of carbonitride precipitation during deformation in Nb-Ti microalloyed steels

  • Y. Zeng
  • W. Wang
Article

Abstract

A thermo/kinetics computer model has been developed to predict the precipitation behavior of complex precipitates in Nb-Ti bearing steels under hot deformation condition. The equilibrium concentration of substitutional elements in austenite and the driving force for precipitation are calculated by the thermodynamic model. The time dependence of volume fraction and mean radius of precipitates is predicted by the kinetics model on the basis of classical nucleation and growth theory. In the kinetics model, the effect of hot deformation on precipitation is taken into account in terms of increase in nucleation sites and the enhanced diffusivity of substitutional solutes along dislocation, the decrease of solute concentration in austenite, and the driving force for precipitation are determined by a mean field approximation method. More importantly, the present model treats nucleation and growth as a concomitant process by using the finite differential method, which is different from the traditional one that treats nucleation and growth as a sequential stage. The model has been further validated by the experimental data in the literature.

Keywords

Austenite Nucleation Rate Heat Affected Zone Dislocation Core Precipitation Kinetic 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

References

  1. 1.
    Kanasawa S, Okamoto K (1976) Trans Iron Steel Inst Jpn 16:486Google Scholar
  2. 2.
    Rainforth WM, Sellars CM (2002) Acta Mater 50:735CrossRefGoogle Scholar
  3. 3.
    Houghton DH (1982) Thermomechanical processing of microalloyed austenite. AIME, Pennem, p 267Google Scholar
  4. 4.
    Loberg B, Strid J, Easterling KE (1984) Metall Trans 15A:83Google Scholar
  5. 5.
    Okaguchi S, Hashimoto T (1987) Trans Iron Steel Insf Jpn 27:467Google Scholar
  6. 6.
    Hansson P (1989) Scand J Metal 18:295Google Scholar
  7. 7.
    Chen Z, Loretto (1987) Mater Sci Technol 391:836Google Scholar
  8. 8.
    Prikryl M, Kroupa A (1996) Meta Mater Trans 27A:1150Google Scholar
  9. 9.
    Strid J, Easterling KE (1985) Acta Metall 33:2057CrossRefGoogle Scholar
  10. 10.
    Heilong Z (1991) Meta Trans 22A:1513Google Scholar
  11. 11.
    Okaguchi S, Hashimoto T (1992) ISIJ Int 32:283Google Scholar
  12. 12.
    Liu WJ, Jonas JJ (1989) Metall Trans 20A:1361CrossRefGoogle Scholar
  13. 13.
    Suzuki S, Weatherly C (1987) Acta Metall 18A:211Google Scholar
  14. 14.
    Subramanian SV, Embury JD (1987) Int. Conf on Pipe Technology, ItalyGoogle Scholar
  15. 15.
    Gladman T (1989) The physical metallurgy of microalloyed steels. The Institute of Materials, UKGoogle Scholar
  16. 16.
    Porter DA, Easterling KE (1992) Phase transformations in metals and alloys. Stanley Thornes, CheltenhamGoogle Scholar
  17. 17.
    Kashchiev D (2000) Nucleation: basis theory with applications. Butterworth Heinmann, OxfordGoogle Scholar
  18. 18.
    Kammann R, Wagner R (1991) Mater Sci Tech. Weinheim, VCHGoogle Scholar
  19. 19.
    Wu DT (1996) In: Solid state physics: advances in research and applications. Academic Press, New York, p 50Google Scholar
  20. 20.
    Robson JD (2003) Acta Metall 23:1453Google Scholar
  21. 21.
    Cahn JW (1957) Acta Metall 51:69Google Scholar
  22. 22.
    Dutta B, Sellars CM (1992) Acta Metal Mater 40:653CrossRefGoogle Scholar
  23. 23.
    Gomez-Ramirez R, Pound GM (1973) Metall Trans 7A:1953Google Scholar
  24. 24.
    Weertman JW, Weertman JR (1964) Elementary dislocation theory. Macmillan, New YorkGoogle Scholar
  25. 25.
    Aaron HB, Fainstein D (1970) J Appl Phys 41:4404CrossRefGoogle Scholar
  26. 26.
    Harrison A (1978) Defects Diffusion Forum 21:576Google Scholar
  27. 27.
    Sutton AP, Balluffi RW (1995) Interface in crystalline materials. Clarendon Press, OxfordGoogle Scholar
  28. 28.
    Peterson NL (1980) Grain-boundary structure and kinetic. ASM, Metals Park, OHGoogle Scholar
  29. 29.
    Zener R (1965) J Appl Phys 24:2514Google Scholar
  30. 30.
    Nobuhiro F (2000) Ph.D. thesis, The University of SheffieldGoogle Scholar
  31. 31.
    Avrami M (1939) J Chem Phys 72:12Google Scholar
  32. 32.
    Kolmogorov AN, Izv A (1937) Nauk Ser Mat 13:55Google Scholar
  33. 33.
    Janampa CS (1982) Ph.D. thesis, The University of SheffieldGoogle Scholar
  34. 34.
    Liu WJ, Jonas JJ (1989) Metall Trans 20A:689CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  1. 1.Baosteel Technology CenterShanghaiP.R. China

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