Combination method of strain-rate cycling test and ultrasonic oscillation was carried out for KCl doped with Sr2+. The plots of strain-rate sensitivity of flow stress and stress decrement due to oscillation, which can be obtained through the combination method, had two bending points and two plateau places at various temperatures. The force-distance profile between a dislocation and an impurity was investigated on the basis of the temperature dependence of first bending pointτp1. Then, the critical temperature, TC, for the specimen was found to be about 227K.
moving dislocation
plastic deformation
strain-rate cycling tests
effective stress due to impurities