A phenomenological structural approach to high-temperature creep

Abstract

1. Relationships have been derived within a structural phenomenological approach to describe high-temperature plastic deformation; examples have been taken for pure nickel, nickel-iron alloys, and chromium-nickel steel to confirm the model and the method of calculation. 2. High-temperature plastic deformation at constant stress is determined by the following: a) the kinetic coefficients\(\bar t\) and\(\bar \tau \), which characterize the rates of hardening and recovery together with the exponential dependence on stress and temperature; b) the deformation capacity of the material e1 in the absence of recovery. 3. Methods have been proposed for calculating the true activation energies of hardening and recovery, as well as the microscopic elastic limit\(\bar \sigma \).