Abstract
The unified inelastic constitutive equation suggested in the previous report is extended to cyclic inelastic deformation and creep deformation of 2 1/4 Cr-1 Mo steel at 550°C. Two of the parameters in the monotonic model decrease with respect to the accumulated inelastic strain, resulting in cyclic softening of the internal stress and the overstress. To describe creep deformation, rate-dependent strain hardening of the internal stress is investigated and introduced into its evolution equation. Through several numerical simulations, the agreement is again found to be good.
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