Uniaxial cyclic visco-plasticity analysis using the UVP model is conducted using the home-made UMAT on a one-element cube model in ABAQUS, in conjunction with the optimized material parameters for calibration of SSFS experimental LCF data at 600 °C for FV566. The calibration procedure is achieved through the comparison between the predicted stress-strain hysteresis loop and experimentally measured SSFS uniaxial high temperature LCF data for a strain-rate of 0.01%s-1 and an applied strain-range of ± 0.7%. The results in Fig.5a illustrates an excellent agreement between the calibrated model and the experimental data at the initial cycle. The good comparison of the predicted and measured cyclic softening behavior is presented in Fig.5b.