Nano/Ultrafine Structured AA1100 by ARB Process

Abstract

In this study, the effect of accumulative roll bonding (ARB) process at room temperature and without any annealing among cycles on the microstructure and mechanical properties of a commercially pure aluminum AA1100 was investigated. Microstructural characterizations were done by electron backscattering diffraction (EBSD) and scanning electron microscopy (SEM). It was observed that ARB is a promising process for manufacturing nano/ultrafine grained structures in aluminum sheets. The four cycle accumulative roll bonded (ARBed) sample had an almost RD// ⟨ 111 ⟩ texture, while after the sixth cycle it had a strong {001} ⟨ 111 ⟩ ∼ {112} ⟨ 111 ⟩ copper texture. The tensile strength, elongation, and hardness of the ARBed samples increased with the number of ARB cycles. But their variation was not similar. Observations revealed that the failure mode in the ARBed AA1100 aluminum was a shearing ductile rupture with elongated shallow shear dimples.