Annealing time dependence of isochronal recovery in cold-worked aluminum

Abstract

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.

Room Temperature Recovery of Cryogenically Deformed Aluminium Alloys

“…Recovery is characterized by dislocation rearrangement and annihilation of defects to reduce the total energy of the system after deformation. Only at certain temperatures could the barrier for this processes be overcome, leading to climb and cross slip of dislocation [28][29][30][31][32][33]. Recovery due to dislocation movement is sensitive to stacking fault energy (SFE).…”