Modelling differential scanning calorimetry curves of precipitation in Al-Cu-Mg

Emmanuel Hersent (1, 2, 3) , Julian Haworth Driver (4) , David Piot (3, 5)

1 MPM-ENSMSE - Département Microstructures et Propriétés Mécaniques
2 PECM-ENSMSE - Plasticité, Endommagement et Corrosion des Matériaux
3 LCG-ENSMSE - UMR 5146 - Laboratoire Claude Goux
4 MPM-ENSMSE - Département Microstructures et Propriétés Mécaniques
5 RMT-ENSMSE - Département Rhéologie, Microstructure, Thermomécanique

The heat flux during a differential scanning calorimetry (DSC) experiment of a precipitation reaction is expressed analytically as a function of the interfacial energy, the solid solution composition and the precipitate fraction. Using a physically based model of nucleation, growth and dissolution, the respective contributions of these terms are compared for the case of S phase precipitation in AA2024 (Al-4% Cu-2% Mg). Good overall agreement is obtained for the experimental and simulated DSC curves if the interfacial energy is tuned correctly.

Mots clés: Differential scanning calorimetry; Aluminium alloys; Phase transformation kinetics

Domaines: Matériaux

Emmanuel Hersent, Julian Haworth Driver, David Piot. Modelling differential scanning calorimetry curves of precipitation in Al-Cu-Mg. Scripta Materialia, 2010, 62 (7), pp.455-457. ⟨10.1016/j.scriptamat.2009.12.009⟩. ⟨hal-00854051⟩