Abstract:
The activation parameters are estimated at the steady stage of creep during tension of aluminum and lead in the range of the exponential and power stress dependences of the steady-state creep rate. A jump of the effective activation energy is shown to occur in the stress dependence of the creep rate at $T\ge 0.5T_m$. This jump is approximately equal to the difference between the activation energies of self-diffusion and pipe diffusion.
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