Figure 2. Friction stir processed FSWed, (a) Tensile stress-strain
curves and (b) Tensile strengths bar charts.
Figure 3 presents the fracture surface morphology of the tensile
specimens. The tensile specimens failed at the HAZ of the AA8011 which
is the alloy with low strength hence both joints showed a similar
fractographs. The ductile failure mode characterize by quasi state
cleavage, dimples, matrix cracks, microvoids and tear ridges were
observed [29, 33].