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Preparation of ultrafine-grained twin-roll cast AlMg3 sheets by accumulative roll bonding

Abstract Accumulative roll bonding is a method for achieving grain refinement of metallic materials by severe plastic deformation, resulting in strength superior to that of conventionally manufactured sheets. The method has been successfully used by the authors to prepare bulk ultrafine-grained sheets from pure aluminium and several twin-roll cast aluminium alloys. The present paper summarizes the results of a study aimed at monitoring the evolution of microstructure and mechanical properties during the accumulative roll bonding process of a twin-roll cast AlMg3 (AW – 5754) alloy. Moreover, the annealing behaviour of the roll-bonded sheets is compared with the behaviour of conventionally rolled counterparts.