Deformation localization and ultrasonic wave propagation rate in tensile Al as a function of grain size

The grain-size dependence of the space period (wavelength) of flow localization observed in the stage of parabolic work hardening of polycrystalline Al has been investigated. The dependence behavior has been defined in the range of grain sizes 8×10^-3 <= D <= 4.5 mm and the significance of the relationship has been elucidated. The effect of grain size on the multi-stage behavior of plastic flow curve and on ultrasonic wave propagation rate has been considered.