Cooling Curve Analysis Method using a Simplified Energy Balance


In this work is described a new cooling curve analysis method focused on the experimental determination of the latent heat of phase changes and phase transformation kinetics.

The method analyses the cooling process of a metallic sample, initially liquid that is contained into a cylindrical metallic mold, both of known weight, thermally isolated at its top and bottom. The method is based on a simplified energy balance associated with the experimental measurement of the temperature change of the sample during its cooling process. The method was applied experimentally to zinc and tin of commercial purity, initially liquids and contained into stainless steel molds in order to determine its ability to determine the latent heat of solidification. In order to validate the method, the obtained values of latent heat were compared with the values reported in thermochemical databases. The obtained results suggest that this method can be used to characterize the solidification of metals.


Keywords: Solidification, Kinetics; Cooling curve analysis.

[1] Baez J, Gonzalez C., Chavez M.R., Castro M., Juarez J. (2004) Fourier thermal analysis of the solidification kinetics in A356/SiCp cast composites, Journal of materials processing technology . Vol. 153–154, pp 531–536.

[2] Barlow, J. O., and D. M. Stefanescu. (1998): ”Computer-aided cooling curve analysis revisited.” Transactions of the American Foundrymen’s Society, Vol. 106, pp 349-354.

[3] Cruz, H., et al. (2006): ”Quantification of the microconstituents formed during solidification by the Newton thermal analysis method.” Journal of materials processing technology Vol. 178 pp. 128-134.

[4] Erbaş, Kadir Can. (2016): ”Analytically Solved Solid Fraction Model for the Newtonian Thermal Analysis of Casting.” Metallurgical and MaterialsTransactions A Vol. 47 pp 3026-3030

[5] Fras, E., et al. ”A new concept in thermal analysis of castings.” Transactions of the American Foundrymen’s Society. Vol. 101 (1993): 505-511

[6] Gale, William F., and Terry C. Totemeier, eds.(2003.) Smithells Metals Reference Book. Butterworth-Heinemann,

[7] Gibbs, John W., and Patricio F. Mendez. ”Solid fraction measurement using equationbased cooling curve analysis.” Scripta Materialia Vol. 58 pp 699-702.

[8] Kamyabi-Gol, Ata, and Patricio F. Mendez. (2015): The Evolution of the Fraction of Individual Phases During a Simultaneous Multiphase Transformation from Time– Temperature Data. Metallurgical and Materials Transactions A Vol. 46 pp 622-638.

[9] Kubaschewski, Oswald, A. L. Evans, and Charles Benjamin Alcock. (1987) Metallurgical thermochemistry. 5