Abstract
Current experimental techniques are described for measuring average interdislocation internal stresses. Measurements of internal stresses during steady state creep of Al and AI—Mg are reported. The predicted recovery rate based on the measured internal stress dependence of the steady state creep rate agrees with Friedel's network growth model when one accounts for the position dependence of the internal stress. The variation of internal stress during normal and inverted primary creep is reported. From transient creep measurements it is possible to evaluate the stress dependence of the average dislocation velocity and mobile dislocation density. Results of measurements on Al 5 % Mg indicate that the average dislocation velocity depends linearly on the effective stress while the mobile dislocation density varies reciprocally with the internal stress.
Published Version
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