Abstract
The recovery of polycrystalline cadmium plates, after being deformed by internal stresses due to anisotropic thermal expansion during cooling, has been investigated by measuring the increase in the vibration frequency of the plate with time and varying the temperature as a parameter. The recovery of frequency with time was shown to follow an exponential law with a characteristic time of the order of few hours, thus reaching a limiting frequency after sufficiently long time. This limiting frequency is found to increase with the increase in the annealing temperature. The activation enthalpy controlling the recovery process is about 0.12 eV. The recovery is explained in terms of elimination of dislocations kinks produced during the deformation.
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