Power plant steels are subjected to high thermomechanical stresses during operation and commonly experience failure due to creep damage. The development of techniques for the non-destructive evaluation of this creep damage has been a major research area. Magnetic hysteresis-based NDE,
which is dependent on the measurement of hysteresis loop parameters, has received considerable interest. However, doubts persist due to the lack of a strong correlation between measured parameters and creep damage. This paper reviews the major reported attempts to develop this correlation.
An overview of microstructural evolution in power plant steels during creep damage is also presented. Theoretical modelling of magnetic properties for the microstructural evolution in the material of interest is suggested as a viable option to develop a sound correlation. Various modelling
techniques are summarised and alterations in micromagnetic modelling are suggested for the purpose. Future scopes of research in the field are also discussed.