Cladding of Mg alloy with Al by twin-roll casting

Abstract

Cladding of Mg alloy with Al has been conducted by simultaneous casting, cladding and rolling a using twin-roll casting process. The as-cast microstructure shows the presence of Mg17Al12 in the reaction zone with good interfacial bonding between the Al and the base Mg alloy. Annealing of the clad sheet results in the additional formation of Mg2Al3 along the Mg/Al interface. Subsequent rolling of the as-annealed sheet reduces the thickness of the reaction zone with a resultant improvement in the formability of the clad sheet. (C) 2011 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.