The behavior of both transient and steady state creep of Al-22 wt% Ag alloy was investigated using a constant stress in the aging temperatures range 423 to 683 K where torsional oscillations of different frequencies and amplitudes were operated at various testing temperatures. The subsequent decrease and increase in the creep parameters, n, beta and epsilon(s)t with increasing aging temperatures has been explained on the basis of structure transformations occurring in Al-Ag system and their mode of interaction with mobile dislocations created by the applied stress and the imposed oscillations. An augment in both transient and steady state rates was observed by increasing both frequency and amplitude of the applied oscillations. Dislocation intersection mechanism is assumed as the rate controlling mechanism for both creep stages. (C)2002 Kluwer Academic Publishers.