On two conflicting estimates of the Peierls stress

摘要

The apparent conflict between two experimental estimates of the Peierls stress in fee metals, sigma(B) from Bordoni peak experiments and sigma(f) from low-temperature plastic flow measurements, is settled within the standard Peierls model of dislocation dynamics. We prove that the Peierls stress is estimated correctly by sigma(B), the ratio sigma(f)/sigma(B) being proportional to the (small) dislocation damping constant. [References: 19]