On the Temperature Rate Dependent Transformation Processes


Article Preview

Kinetic models of new types are suggested which are designated primarily to predict the progress of non-isothermal transformations occurring during rapid heating and cooling in alloys. A common feature of each model outlined is that it takes into account not only the varying temperature but also the rate of temperature change on the transformation rate of the process. The two models represented by differential equations are generated by using the concept of virtual kinetic parameters, which can be determined from non-isothermal experiments only. A key property of the virtual parameter "p" involved in the transformation rate equations is that it quantitatively characterizes the temperature rate dependence of the non-isothermal reaction.



Materials Science Forum (Volumes 537-538)

Edited by:

J. Gyulai and P.J. Szabó




T. Réti et al., "On the Temperature Rate Dependent Transformation Processes", Materials Science Forum, Vols. 537-538, pp. 571-578, 2007

Online since:

February 2007




[1] J.S. Kirkaldy and R. C Sharma: A New Phenomenology for Steel IT and CCT curves, Scripta Metall., Vol. 16, 1982, pp.1193-1198.

DOI: 10.1016/0036-9748(82)90095-3

[2] J.W. Cahn: Transformation Kinetics during Continuous Cooling, Acta Metall., Vol. 4, 1956, pp.572-575.

[3] J.W. Christian: The Theory of Transformations in Metals and Alloys, Part I, 2 nd . Edn., Pergamon Press, Oxford, 1975, pp.546-547.

[4] J.B. Leblond and J. Devaux: A New Kinetic Model for Anisothermal Metallurgical Transformations in Steels Including Effect of Austenite Grain Size, Acta Metall., Vol. 32, 1984, pp.137-146.

DOI: 10.1016/0001-6160(84)90211-6

[5] T. Reti, L. Horvath and I. Felde: A Comparative Study of Methods Used for the Prediction of Nonisothermal Austenite Decomposition, JMEPEG, Vol. 6, 1997, pp.433-442.

[6] T. Reti et al.: Prediction of As-quenched Hardness after Rapid Austenitization and Cooling of Surface Hardened Steels, Comp. Materials Science, Vol. 15, 1999, pp.101-112.

DOI: 10.1016/s0927-0256(98)00128-1

[7] T. Reti and I. Felde: A non-linear extension of the additivity rule, Comp. Materials Science, Vol. 15, 1999, pp.446-482.

DOI: 10.1016/s0927-0256(99)00035-x

[8] S.S. Sahay and K. Krishnan: Modeling the isochronal crystallization kinetics, Physica B, Vol. 348, 2004, pp.310-316.

DOI: 10.1016/j.physb.2003.12.006

[9] S.S. Sahay and K. Krishnan: Analysis of the nonisothermal crystallization kinetics in three linear aromatic polyester systems, Thermochimica Acta, Vol. 430, 2005, pp.23-29.

DOI: 10.1016/j.tca.2004.12.007

[10] T. Reti: On the physical and mathematical interpretation of the isokinetic hypothesis, J. Phys. IV France, Vol. 120, 2004, pp.85-91.

[11] E. J. Mittemejer: Review, Analysis of the Kinetics of Phase Transformations, J. Mater. Sci., Vol. 27, 1992, pp.3977-3987.

[12] T. Reti: Short Comments on Kinetic Models Involving Changes in Activation Energy, Journal of Thermal Analysis and Calorimetry, Vol. 62, 2000, pp.325-327.

Fetching data from Crossref.
This may take some time to load.