Abstract
The stress and temperature dependence of steady state creep rates, recovery rates (r=−∂σ⁄∂t) and work hardening rates (h=∂σ⁄∂ε) were studied. The rate controlling mechanism changed from bulk to core-diffusion at about 673 K. Application of the Yoshinaga’s discriminant revealed that the effective stress level of flow stress is negligibly small.
Measurements of r and h were conducted by stress relaxation tests. The results were compared with a network growth theory of creep. Coincidence between the experiments and the theory was fairly good.
