P92 steel creep-fatigue interaction responses under hybrid stress-strain controlled loading and a life prediction model

In contrast to conventional strain-controlled creep-fatigue interaction (CCFI) loadings, a novel hybrid stress- and strain-controlled creep-fatigue interaction (HCFI) loadings were developed on P92 steel. Dwell stresses ranging from 140 MPa to 170 MPa, and dwell periods of 300 s, 600 s and 1800 s were employed at 625 °C. The test responses demonstrate that cyclic softening and hardening effects lead to complicated cyclic responses. In addition,...