Comments on: ‘Calorimetric study of 6061-Al–15vol.% SiCw PM composites extruded at different temperatures’ by A. Borrego, G. González-Doncel, Mater. Sci. Eng. A 245 (1998) 10

In this contribution, the β″ and β′ phase precipitation rates in a 6061 (Al–Si–Mg) alloy, as measured by differential scanning calorimetry (DSC), are fitted employing the Starink–Zahra (SZ) model. Similar to precipitation reactions in a large number of other alloys, the SZ model fits the DSC data on 6061 close to perfectly. The distinctive elements of the SZ model, i.e. its treatment of nucleation rates, impingement and temperature-dependent solubility, are discussed and contrasted with other models.