Experimental investigation of mechanical properties of AA1050 aluminum produced by accumulative roll bonding process

Accumulative roll bonding process (ARB) is one of the new mechanical methods for applying severe plastic deformation (SPD) and achieving fine grain structure in materials. In this research, five passes of ARB process are performed on Al 1050 sheets and investigated mechanical properties and fracture mode of the microstructure. Accumulative roll bonding process applied without using lubricant, in the ambient temperature repeated in five cycles continuously and without heat treatment between cycles of the process that the value of reduction thickness is 50% in each cycle. The evaluation of mechanical properties, performed by uniaxial tensile test, micro -Vickers hardness and fracture cross section captured by scanning electron microscope (SEM). Finally, was observed that by increasing the number of ARB cycles, micro hardness and tensile strength increased, but this increase in the initial cycles was larger of The next cycles. Also, elongation after the first cycle decreased and then increased. Therefore the most tensile strength and elongation obtained in Fifth cycle. The variation for mechanical properties during ARB due to governing cold work and high strain hardening at initial cycles and improve microstructural and grain refinement at last cycles

Keywords:

ARB , 1050 aluminum sheet , mechanical properties , microstructure