At an amplitude of 3·10−4 small plastic deformations (3–4%) reduce the damping capacity of recrystallized or partly recrystallized aluminum. High-purity aluminum (A-999) retains higher values of the decrement with plastic deformations up to 6% than aluminum A-99.
Annealing of partially recrystallized aluminum at temperatures corresponding to the development of recrystallization processes favors an increase of the energy scattering of vibrations.
The change in the damping capacity of aluminum with plastic deformation and annealing conforms with the dislocation theory of damping.
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Drits, M.E., Rokhlin, L.L. & Ryuchina, G.V. Energy scattering of vibrations in aluminum after plastic deformation and annealing. Met Sci Heat Treat 14, 656–658 (1972). https://doi.org/10.1007/BF00647901
- Plastic Deformation
- Recrystallization Process
- Small Plastic