Anisotropic behavior studies of aluminum alloy 5083 H0 using a micro tensile test stage in a FEG SEM
Abstract The plastic anisotropic characteristics of aluminum alloy 5083 H0 at varying strain rates were investigated using uniaxial tensile testing inside an ultra high resolution FEG SEM. The stress strain graphs obtained show that for the rolling direction the mechanical properties decrease with increased strain rate from 0.1 to 0.5 mm/min. The transverse direction mechanical properties increase from 0.1 to 0.2 and decrease at 0.5 mm/min. Serrated yielding for both directions was more pronounced in the 0.1 mm/min and 0.2 mm/min than in 0.5 mm/min strain rate. The fracture surface was characterized by nucleation of micro dimples of varying sizes and shapes, which became shallower with increasing strain rates. Intermetallic particles were observed in the large micro dimples on the fractured surface. The microstructure anisotropy revealed a shear type failure mode due to the shear bands localization for the 0deg direction and for the 90deg direction, failure mode showed both intergranular and shear type failure.