Kinetics of Stress Relaxation in Normal and Superconducting States

Abstract
An investigation is described of the kinetics of stress relaxation and postrelaxational effects in normal (N) and superconducting (S) states of polycrystalline 99.9995% pure lead at 4.2 °K. The work‐hardening coeificient θ(r) during stress relaxation has been found to be much larger than that θ(r) during dynamic deformation. It has also been revealed that θ(r)depends on the state of the sample (N or S state) where θ>θ.