Microstructure Evolution and Mechanical Properties of Al 1050/Al 5083 Laminate Composites Produced by Accumulative Roll Bonding Process

Abstract

Al 1050/Al 5083 multilayer laminate composites were produced by accumulative roll bonding (ARB) process up to three cycles at room temperature. Tensile strength along rolling direction and hardness was evaluated for base alloys and laminate composites. As compared to the base alloys, tensile strength and hardness of Al laminate composites increase significantly after every ARB cycle. The third cycle ARBed sample exhibited the tensile strength of 202 MPa, which is 29% more than the first cycle ARBed sample. Similarly, the BHN (Brinell hardness number) of the third cycle ARBed sample is 73, which is 46% more than the first cycle ARBed sample. ARBed samples show very limited elongation. Microstructural evolutions of ARBed sheets were analyzed by scanning electron microscopy (SEM). Analysis revealed that grains of Al were refined significantly after every ARB cycle.