A Calorimetric Study on the Precipitation of T1 Phase during the Ageing of an Al-Li-Cu-Zr Alloy
The precipitation of T1 phase during the ageing of an Al- Li- Cu -Zr alloy sheet was studied by DSC (Differential Scanning Calorimetric) technique. Results showed that precipitation of T1 phase occurred in temperature range of 250°C to 300°C whereas its dissolution occurred within the temperature of 450°C to 530°C. Furthermore, activation energies for precipitation and dissolution of T1 phase were determined 122.1 kJ/mol and 130.3 kJ/mol, respectively.
Andreas Öchsner and Graeme E. Murch
S. Ahmadi et al., "A Calorimetric Study on the Precipitation of T1 Phase during the Ageing of an Al-Li-Cu-Zr Alloy", Defect and Diffusion Forum, Vols. 273-276, pp. 14-17, 2008