Abstract
The presence of traps for hydrogen atoms influences the diffusivity and solubility of hydrogen itself in steels. In the present work, permeation measurements were carried out on hot-rolled microalloyed steels with different C and Ti contents in order to evaluate the number of irreversible and reversible traps. The number per unit volume of irreversible traps was correlated to calculated volume fraction of Ti(C,N) precipitates. These results, combined with microstructural investigations by transmission electron microscopy (TEM), showed that the largest number of irreversible traps was associated with steels having the largest volume fraction of fine and coherent Ti(C,N) precipitates. The reversible traps were associated with free Ti atoms, dislocations, and ferritic grain boundaries. Theoretical calculations confirmed the hydrogen binding energy of Ti free atoms (−27.1 kJ/mol).
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
L.S. Darken and R.P. Smith:Corrosion, 1949, vol. 5, pp. 1–11.
R.A. Oriani:Acta Metall., 1970, vol. 18, pp. 147–58.
K. Kiuchi and R. McLellan:Acta Metall., 1983, vol. 31, pp. 961–84.
J.P. Hirth:Metall. Trans. A, 1980, vol. 11A, pp. 861–90.
I.M. Bernstein and B.B. Rath:Metall. Trans. A, 1973, vol. 4A, pp. 1545–51.
R. Valentini, A. Solina, and C. Cramer:Steel Res., 1994, vol. 65, pp. 110–13.
G.M. Pressouyre and I.M. Bernstein:Metall. Trans. A, 1978, vol. 9A, pp. 1571–80.
I. Takahashi, Y. Matsumoto, and T. Tanada:Proc. JIMIS-2, Minakami, Tokyo, Japan, 1979, pp. 285–89.
M.F. Stevens and I.M. Bernstein:Metall. Trans. A, 1989, vol. 20A, pp. 909–19.
K. Ono and M. Meshii:Acta Metall., 1992, vol. 40, pp. 1357–64.
M.A.V. Devanathan and Z.O.J. Stachurski:Proc. R. Soc., 1962, vol. 270A, pp. 90–102.
J. Bowker and G.R. Piercy:Metall. Trans. A, 1985, vol. 16A, pp. 715–19.
R.B. Hutchings, D.H. Ferris, and A. Turnbull:Br. Corros. J., 1993, vol. 28, pp. 309–12.
R. Valentini and A. Solina:Mater. Sci. Technol., 1994, vol. 10, pp. 908–14.
J. Crank:The Mathematics of Diffusion, Clarendon Press, Oxford, 1987.
P.J. Goodhew:Specimen Preparation for Transmission Electron Microscopy of Materials, Oxford University Press, Royal Microscopical Society, Oxford, 1984.
S. Matera and E. Anelli: inMicros. Microanal. Microstruct., 1995, vol. 6, pp. 633–46.
A. Taylor and J. Kagle Brenda:Crystallographic Data on Metal and Alloy Structures, Dover Publications Inc., New York, NY, 1963, p. 221.
E.T. Turkdogan:Ironmaking and Steelmaking, 1989, pp. 61–69.
G.M. Pressouyre and I.M. Bernstein:Metall. Trans. A, 1981, vol. 12A, pp. 835–44.
A.J. Kumnick and H.H. Johnson:Metall. Trans., 1974, vol. 5, pp. 1199–1206.
G.M. Evans and E.C. Rollason:J. Iron Steel Inst., 1969, vol. 207, p. 1484.
P. De Gregorio, R. Valentini, A. Solina, and F. Gastaldo:La Metallurgia Italiana, 1991, vol. 83, pp. 567–74.
George R. Caskey, Jr. and W.L. Pillings:Metall. Trans. A, 1975, vol. 6A, pp. 467–76.
A. Turnbull, M.W. Carroll, and D.H. Ferris:Acta Metall., 1989, vol. 37 pp. 2039–46.
J.R. Scully, J.A. Van Den Avyle, M.J. Cieslak, A.D. Romig, and C.R. Hills:Metall. Trans. A, 1991, vol. 22A, pp. 2429–44.
G.M. Pressouyre and I.M. Bernstein:Acta Metall., 1979, vol. 27 pp. 89–100.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Valentini, R., Solina, A., Matera, S. et al. Influence of titanium and carbon contents on the hydrogen trapping of microalloyed steels. Metall Mater Trans A 27, 3773–3780 (1996). https://doi.org/10.1007/BF02595626
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02595626