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 alpha(c) particles below 200 degrees C, dissolution of primary Al(6)Fe and further precipitation of alpha(c) particles above 350 degrees 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 alpha(c) precipitation at high strain levels and thus enjoys favourable conditions, producing an acceptable grain structure. Recovery predominates at still higher strains. (C) 2009 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.