Annealing time dependence of isochronal recovery in cold-worked aluminum

Wire drawn aluminum specimens of about 0.2 mm diameter are deformed by about 16% at 4.2 K. An isochronal annealing experiment of electrical resistivity for 1, 3, or 10 min after the deformation is carried out every 5 K temperatures ranging from 30 to 150 K. The recovery sub-peaks appear at around 75 and 90 K and are shifted toward the lower temperature with increasing annealing time. The observed differential isochronal recovery curves give support to a model in which excess vacancies induced by the deformation annihilate at the jogs.