Anisotropic behavior studies of aluminum alloy 5083-H0 using a micro-tensile test stage in a FEG-SEM

作者：Motsi Glenda T^*; Shongwe Mxolisi B; Sono Tleyane J; Olubambi Peter A

来源：Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 2016, 656: 266-274.

DOI：10.1016/j.msea.2016.01.035

• In-situ SEM tensile test
• Aluminum alloy
• Anisotropy

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 0 direction and for the 90 direction, failure mode showed both intergranular and shear type failure.

• 出版日期2016-2-22