ملخص: Recrystallization, transition phase formation and dissolution of Al-12 wt.% Mg alloy were investigated as a function of the defect density introduced by cold rolling and cold compression deformation. Low and high deformation amounts have been used with the objective that the recrystallization takes place combined with the precipitation reaction to attempt to follow an eventual influence of plastic deformation on the dilatometric curves, the sequence of the precipitation and consequently, on the nature of precipitate particles at determined ageing temperatures. Important anomalies resulting from the plastic deformation appeared in the dilatometric curves, which must be influenced by the recrystallization and the precipitation processes. The latter have never been studied through dilatometric analysis. However, no effect on the precipitation sequence has been observed and it has been confirmed that at relatively high deformation amounts a fine crystalline structure is obtained, while at low deformation amounts a coarser structure is developed. Moreover, it has been shown that the recrystallization does not occur but only the recovery stage is observed. Furthermore, the acceleration effect of plastic deformation on particles nucleation and growth is confirmed.

لغة: إنجليزية