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Thermal analysis applied to estimation of solidification kinetics of Al–Si aluminium alloys

Loizaga, A. and Niklas, Andrea and Fernandez-Calvo, Ana Isabel and Lacaze, Jacques Thermal analysis applied to estimation of solidification kinetics of Al–Si aluminium alloys. (2009) International Journal of Cast Metals Research, The, vol. 22 (n° 5). pp. 345-352. ISSN 1364-0461

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Official URL: http://dx.doi.org/10.1179/174313309X380378

Abstract

Evaluation of solidification kinetics by thermal analysis is a useful tool for quality control of Al–Si melts before pouring provided it is rapid and highly reproducible. Series of thermal analysis records made with standard cups are presented that show good reproducibility. They are evaluated using a Newton’s like approach to get the instantaneous heat evolution and from it solidification kinetics. An alternative way of calculating the zero line is proposed which is validated by the fact that the latent heat of solidification thus evaluated is within 5% of the value calculated from thermodynamic data. Solidification kinetics was found highly reproducible provided appropriate experimental conditions were achieved: high enough casting temperature for the cup to heat up to the metal temperature well before solidification starts; and equal and homogeneous temperatures of the metal and of the cup at any time in the temperature range used for integration.

Item Type:Article
Additional Information:Thanks to Maney Publishing editor. The definitive version is available at http://www.maney.co.uk/ The original PDF of the article can be found at International Journal of Cast Metals Research website : http://www.ingentaconnect.com/content/maney/ijcmr/2009/00000022/00000005/art00001?token=00561ca6e0a32d7ea228573d257025707b23766c7a3138595b47467c4e7547543c7e386f642f466f4564b6
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution: Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
Other partners > IK4 - Azterlan - Centro de Investigación Metalúrgica (SPAIN)
French research institutions > Centre National de la Recherche Scientifique - CNRS
Laboratory name:
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Deposited By:Nihad Lahdifi

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