Abstract :
The effect of homogenization treatment on the
recrystallization process in a twin-roll cast AlFeSi alloy was
investigated by means of calorimetry, microstructural
analysis, electrical conductivity, and hardness measurements
and cupping tests. The response to annealing of coldrolled
AlFeSi sheet processed with a homogenization
treatment at the cast gauge is a typical two-stage, recovery
and recrystallization process, while that processed without
homogenization softens without recovery. The rather
limited precipitation capacity in the former allows recrystallization
to occur largely discontinously, favoring the
annealing texture. The nucleation rate and the volume
fraction of the discontinously recrystallized grains are
largely reduced in the sheet processed without homogenization,
owing to extensive dynamic precipitation. This
reduces the strength of the annealing texture components
and gives a more or less random crystallographic texture
after annealing. With a relatively finer-grain structure and a
nearly random crystallographic texture, AlFeSi sheet processed
to soft temper at 1 mm without a homogenization
treatment is an attractive foil stock material
