Downstream Processing of Some Al-Fe-Mn-Si and Al-Fe-Si TRC Alloys and Its Influence on Sheet/Foil Properties

Abstract

This paper describes the general trends correlating mechanical and corrosion properties with chemical composition of some Al-Fe-Si and Al-Fe-Mn-Si alloys for foils. These Al-rich eutectic alloys based on Al-Fe-Si and Al-Fe-Mn, when roll cast and appropriately processed to give fine and regular dispersion of intemetallic particles, can provide good combinations of strength and ductility. These characteristics have been responsible for the alloy success in replacing commercially pure (CP) aluminum for applications in thin sheet and foil gauges. The objective was to obtain an opinion about the possible role of alloying elements in corrosion behavior and mechanical properties of these commercial materials produced by cold rolling of twin roll cast strips.

Recrystallization of twin-roll cast Al–Fe–Si foil stock processed without homogenization

“…The manufacturing cycle often starts with twin-roll casting and relies on a recrystallization anneal at some intermediate gauge to restore ductility to facilitate further rolling to foil gauges [2][3][4][5]. A relatively small volume of heat source and a relatively large heat sink in twin-roll casting lead to rapid solidification in the caster roll gap [6,7] producing cast strips in a non-equilibrium state.…”