An anomalously amplitude-dependent internal friction peak which appeared near to room temperature in cold-worked samples, was stabilized by using suitable thermo-mechanical treatments. The activation energy which was associated with this peak was determined, for the first time, to be equal to 0.8eV. This was close to the activation energy that was associated with pipe diffusion (0.70 to 0.84eV), and thus strongly supported the proposition that this peak originated from the short-range diffusion of solute atoms (such as Cu) along dislocation kinks in Al.

A.W.Zhu, T.S.Kê, T.Ge: Physica Status Solidi A, 1991, 128[1], 95-102