Interannealing twin-roll cast Al-Fe-Si strips without homogenization

When annealed without homogenization, a twin-roll cast Al-1Fe-0.2Si strip undergoes precipitation of αc particles below 200 °C, dissolution of primary Al6Fe and further precipitation of αc particles above 350 °C. Recrystallization and then recovery processes are superimposed on this reaction sequence when the cast strip is cold rolled before thermal exposure. Recrystallization is over before there is measurable αc precipitation at high strain levels and thus enjoys favourable conditions, producing an acceptable grain structure. Recovery predominates at still higher strains.