Abstract
Measurements of the dynamic modulus and internal friction of 5N and 6N lead were performed after low-temperature plastic deformation. Low-temperature deformation induces an important decrease in the low-temperature modulus. This result is associated with lubrication dislocation motion due to intrinsic point defects. Finally, the evolution of the relaxation peak observed when the annealing temperature is increased demonstrates that Bordoni relaxation due to kink pair formation occurs in lead at a very low temperature compared with other f.c.c. metals.
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