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Strength of Materials

, Volume 50, Issue 1, pp 218–228 | Cite as

Strain-Induced Precipitation Kinetics of Vanadium Carbonitride Precipitates with the Cubic Structure in High-Strength Weathering Steels

  • J. Cheng
  • J. Qing
  • H. F. Shen
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The strain-induced precipitation kinetic model of vanadium carbonitride [V(C, N)] precipitates with the cubic structure in vanadium-nitrogen (V–N) microalloyed high-strength weathering steels was constructed and validated. The V(C, N) precipitates possess an fcc structure with the lattice sites and octahedral interstitial sites (O-sites) being occupied with V atoms, and C and N atoms, respectively. The model is based on the cubic structure for V(C, N) precipitates instead of the spherical one, since recent experimental results clearly demonstrate that the strain-induced precipitation of V(C, N) in austenite is of the cubic structure. The nitrogen content effect on precipitation–temperature–time (PTT) curve pattwerns was also studied. With the nitrogen content, the PTT curve nose temperature increased, and the curves shifted left. When the nitrogen content in steels was dropped, PTT curves of V(C, N) precipitates in austenite acquired an S-shape, since free energy conversion is nonlinear. Additionally, thermodynamic software was employed to calculate the phase equilibrium of V(C, N) precipitates in the new high-strength weathering steels. The N site fraction of N during the V(C, N) precipitation was much larger for steels with high N contents, compared to those with low ones.

Keywords

strain-induced precipitation kinetic model cubic V(C N) precipitates microalloyed steel austenite precipitation–temperature–time curve thermodynamic calculation 
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Notes

Acknowledgments

This work was financially supported by the Project of Green Manufacturing System Integration of MIIT, China (2016-64).

References

  1. 1.
    Q. L. Yong, M. T. Ma, and B. R. Wu, Microalloyed Steel: Physical and Mechanical Metallurgy [in Chinese], China Machine Press, Beijing (1989).Google Scholar
  2. 2.
    H. Adrian, “Thermodynamic model for precipitation of carbonitrides in high strength low alloy steels containing up to three microalloying elements with or without additions of aluminium,” Mater. Sci. Technol., 8, 406–420 (1992).CrossRefGoogle Scholar
  3. 3.
    B. Dutta and C. M. Sellars, “Effect of composition and process variables on Nb(C, N) precipitation in niobium microalloyed austenite,” Mater. Sci. Technol., 3, 197–206 (1987).CrossRefGoogle Scholar
  4. 4.
    W. J. Liu and J. J. Jonas, “Nucleation kinetics of Ti carbonitride in microalloyed austenite,” Metall. Trans. A, 20, 689–697 (1989).CrossRefGoogle Scholar
  5. 5.
    W. J. Liu, “A new theory and kinetic modeling of strain-induced precipitation of Nb(CN) in microalloyed austenite,” Metall. Mater. Trans. A, 26, 1641–1657 (1995).CrossRefGoogle Scholar
  6. 6.
    B. Dutta, E. J. Palmiere, and C.M. Sellars, “Modelling the kinetics of strain-induced precipitation in Nb microalloyed steels,” Acta Mater., 49, 785–794 (2001).CrossRefGoogle Scholar
  7. 7.
    P. Maugis and M. Gouné, “Kinetics of vanadium carbonitride precipitation in steel: A computer model,” Acta Mater., 53, 3359–3367 (2005).CrossRefGoogle Scholar
  8. 8.
    F. Fang and Q. L. Yong, “A model for precipitation kinetics in vanadium microalloyed steel,” J. Iron Steel Res. Int., 17, 36–42 (2010).CrossRefGoogle Scholar
  9. 9.
    Q. L. Yong, Secondary Phase in Steels [in Chinese], Metallurgical Industry Press, Beijing (2006).Google Scholar
  10. 10.
    M. Mukherjee, U. Prahl, and W. Bleck, “Modelling the strain-induced precipitation kinetics of vanadium carbonitride during hot working of precipitation-hardened ferritic–pearlitic steels,” Acta Mater., 71, 234–254 (2014).CrossRefGoogle Scholar
  11. 11.
    S. Zajac, “Precipitation of microalloy carbo-nitrides prior, during and after γ/α transformation,” Mater. Sci. Forum, 500–501, 75–86 (2005).CrossRefGoogle Scholar
  12. 12.
    C. Zener, “Theory of growth of spherical precipitates from solid solution,” J. Appl. Phys., 20, 950–953 (1949).CrossRefGoogle Scholar
  13. 13.
    W. A. Johnson and R. F. Mehl, “Reaction kinetics in processes of nucleation and growth,” T. Am. I. Min. Met. Eng., 135, 416–458 (1939).Google Scholar
  14. 14.
    M. Avrami, “Kinetics of phase change. I General theory,” J. Chem. Phys., 7, 1103–1109 (1939).CrossRefGoogle Scholar
  15. 15.
    M. Avrami, “Kinetics of phase change. II Transformation-time relations for random distribution of nuclei,” J. Chem. Phys., 8, 212–224 (1940).CrossRefGoogle Scholar
  16. 16.
    F. Fang and Q. L. Yong, “A model for precipitation kinetics in vanadium microalloyed steel,” J. Iron Steel Res. Int., 43, 71–74 (2008).Google Scholar

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© Springer Science+Business Media, LLC, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Key Laboratory for Advanced Materials Processing Technology, Ministry of Education, School of Materials Science and EngineeringTsinghua UniversityBeijingChina

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