The variation in ultrasonic attenuation as a function of bias strain was measured during the cyclic bias deformation of 5N-purity Al, and of the alloy, at room temperature. Interactions between dislocations and point defects were analyzed in terms of the dislocation string model. The ultrasonic attenuation was attributed to the vibration of dislocations. The point defects and the cyclic strain amplitude both affected the variation in ultrasonic attenuation.

G.T.Fei, Z.G.Zhu: Physica Status Solidi A, 1996, 153[2], 323-8