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Comparison of thermal analysis and differential thermal analysis for evaluating solid fraction evolution during solidification of Al-Si alloys

Abstract : Both thermal analysis (TA) and differential thermal analysis (DTA) have been used since long to evaluate latent heat release and solid fraction evolution during solidification of metallic alloys. TA makes use of cooling curves recorded under "natural" cooling while DTA consists in recording the temperature difference between the sample temperature and an inert reference during a controlled cooling, i.e. at imposed constant cooling rate. In both cases, the solid fraction evolution is deduced from a calculation of the latent heat release as estimated by means of a heat transfer model. This paper provides a comparison of such evaluations performed on one Al-Si alloy.
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Ana Isabel Fernandez-Calvo, Andrea Niklas, Jacques Lacaze. Comparison of thermal analysis and differential thermal analysis for evaluating solid fraction evolution during solidification of Al-Si alloys. Materials Science Forum, Trans Tech Publications Inc., 2010, vol. 649, pp. 493-498. ⟨10.4028/www.scientific.net/MSF.649.493⟩. ⟨hal-00863172⟩

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