Abstract
Austenitization kinetics of pearlite and ferrite aggregates, in a low carbon steel containing 0.15 wt pct C. were studied in the temperature range of 800 to 870 °C. The transformation was monitored by estimating the volume fraction of austenite and the surface area per unit volume of the austenite-ferrite interfaces by quantitative microscopy. It is concluded that the austenite growth geometry is two dimensional. Between 800 and 840 °C, the two dimensional radial growth of the austenite particles can be described by a simple parabolic law. This suggests a diffusion controlled growth mechanism. However, at 870 °C, the kinetics of the process are different from those at the lower temperatures studied, and the radial growth rate approaches a constant value at long times.
Similar content being viewed by others
References
G. R. Speich and A. Szirmae:Trans. TMS-AIME, 1969, vol. 245, p. 1063.
B. Karlson:Z. Metallkd., 1972, vol. 63, p. 160.
Quantitative Microscopy, R. T. DeHoff and F. N. Rhines, eds., McGraw-Hill, New York, 1968, p. 10.
E. E. Underwood:Quantitative Stereology, Addison-Wesley, Reading, MA, 1970, pp. 5–47.
R. T. DeHoff:Treatise on Materials Science and Technology, vol.1, p. 247, Academic Press, New York, 1972.
W. A. Johnson and R. F. Mehl:Trans. AIME, 1939, vol. 135, p.416.
M. Avrami:J. Chem. Phys., 1939, vol. 7, p. 1103.
A. N. Kolmogorov:Bull. USSR Acad. Sci., 1937, no. 3, p. 343.
R. E. Miles:Proceedings of the 4th International Congress for Stereology, E. E. Underwood, ed., NBS Special Publication 431, 1976, p. 3.
M. Hillert:Acta Metall., 1959, vol. 7, p. 653.
A. M. Gokhale: Ph.D. Dissertation, University of Florida, Gainesville, FL, 1977.
A. M. Gokhale, C. V. Iswaran, and R. T. DeHoff:Met. Trans. A, 1980, vol. 11A, p. 1377.
A. M. Gokhale, C. V. Iswaran, and R. T. DeHoff:Met. Trans. A, 1979, vol. 10A, p. 1239.
G. R. Speich and R. M. Fisher:Recrystallization, Grain Growth and Textures, p. 563, ASM, Metals Park, OH, 1966.
J. W. Cahn:Trans. TMS-AIME, 1967, vol. 239, pp. 610–16.
S. I. Tomkeieff:Nature, 1945, vol. 155, p. 24.
R. A. Vandermeer and P. Gordon:Trans. TMS-AIME, 1959, vol.215, p. 577.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Datta, D.P., Gokhale, A.M. Austenitization kinetics of pearlite and ferrite aggregates in a low carbon steel containing 0.15 wt pct C. Metall Trans A 12, 443–450 (1981). https://doi.org/10.1007/BF02648541
Received:
Issue Date:
DOI: https://doi.org/10.1007/BF02648541