Effect of D16T alloy grain sizes on its deformation inhomogeneity under static and dynamic loading

The effect of grain sizes on the strain homogeneity of a D16T sheet aluminum alloy in static and dynamic tension was studied. An increase in grain sizes is established to result in a significant growth of deformation inhomogeneity. This enhances the fracture of coarse-grained aluminum alloy specimens and contributes to localized strains arising outside the fracture zone. The effect of grain sizes on residual strain levels is shown to decrease with a loading rate, especially in the fracture zone.