Abstract
Mathematical models are developed for both nitriding and nitrocarburizing of iron taking into account the diffusion of N or C and N through various phases and the thermodynamic properties of the ternary Fe-C-N system. Analytical solutions are obtained for the ε/γ′ bilayer growth of the compound layer assuming constant diffusion coefficients, and the results are compared with those obtained from numerical simulations taking into account the concentration-dependent diffusivities. No significant difference was found between these two methods for nitriding of iron. For nitrocarburizing of iron, it was found that the off-diagonal diffusivities of the ε and γ′ phases must be taken into account in the analytical solution in order to obtain reasonable results. In addition, it is shown that the phase constitution of the compound layer produced during nitrocarburizing of iron can be predicted by the numerical simulation.
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References
T. Bell:Source Book on Nitriding, ASM, Metals Park, OH, 1977, pp. 266–78.
W.D. Jentzsch and S. Böhmer:Kristall Technik, 1979, vol. 14 (5), pp. 617–24.
F.K. Naumann:Prakt. Met., 1968, vol. 5, pp. 473–85.
Y. Inokuti, N. Nishida, and N. Ohashi:Metall. Trans. A, 1975, vol. 6A, pp. 773–84.
A. Wells: Ph.D. Thesis, The University of Liverpool, Liverpool, 1982.
J. Slycke and L. Sproge:Surf. Eng., 1989, vol. 5 (2), pp. 125–40.
M.A.J. Somers, P.F. Colijn, W.G. Sloof, and E.J. Mittemeijer:Z. Metallkd., 1990, vol. 81, pp. 33–43.
M.A. Somers and E.J. Mittemeijer:Surf. Eng., 1987, vol. 3 (2), pp. 123–37.
H. Du:J. Phase Equilibria, 1993, vol. 14 (6), pp. 682–93.
H. Du and J. Ågren:Trita-Mac-0565, Royal Institute of Technology, Stockholm, 1994.
J.-O. Andersson, L. Höglund, B. Jönsson, and J. Ågren: inFundamentals and Applications of Ternary Diffusion, G.R. Purdy, ed., Pergamon Press, New York, NY, 1990, pp. 153–63.
J.-O. Andersson and J. Ågren:J. Appl. Phys., 1992, vol. 72, pp. 1350- 55.
J.S. Kirkaldy and D.J. Young:Diffusion in the Condensed State, Institute of Metals, London, 1987, pp. 160–61.
H. Du, M.A.J. Somers, and J. Ågren:Trita-Mac-0571, Royal Institute of Technology, Stockholm, 1994.
J.S. Kirkaldy:Can. J. Phys., 1958, vol. 36, pp. 907–16.
B. Jansson:Trita-Mac-0234, Royal Institute of Technology, Stockholm, 1984.
B. Sundman, B. Jansson, and J.-O. Andersson:CALPHAD, 1985, vol. 9 (2), pp. 153–90.
B. Jönsson:Trita-Mac-0514, Royal Institute of Technology, Stockholm, 1993.
J. Ågren:Scripta Metall., 1986, vol. 20, pp. 1507–10.
P. Grieveson and E.T. Turkdogan:Trans. TMS-AIME, 1964, vol. 230, pp. 407–14.
H. Du, N. Lange, and J. Ågren:Trita-Mac-0569, Royal Institute of Technology, Stockholm, 1994.
D. Firrao, B. DeBenedetti, and M. Rosso:Metall. Ital, 1979, vol. 71, pp. 373–81.
A.J. Somers, N.M. van der Pers, D. Schalkoord, and E.J. Mittemeijer:Metall. Trans. A, 1989, vol. 20A, pp. 1533–39.
P. Ferguson and K.H. Jack:Proc. Heat Treatment '81, The Metals Society, London, 1981, pp. 158–63.
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Formerly Graduate Student, Department of Materials Science and Engineering, Royal Institute of Technology, Sweden
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Du, H., ågren, J. Theoretical treatment of nitriding and nitrocarburizing of iron. Metall Mater Trans A 27, 1073–1080 (1996). https://doi.org/10.1007/BF02649776
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DOI: https://doi.org/10.1007/BF02649776