Key degradation mechanisms for the high-temperature power plant are the microstructural degradation and creep-fatigue of steel components. Creep, fatigue and creep-fatigue performance of structural materials are limited by the microstructural degradation. The underlying need is to develop improved understanding and predictive models of the key microstructural evolution, deformation kinetics and damage processes so that the high-temperature lifetime of materials can be predicted.
The aim of this PhD work is to develop mechanistic-based deformation and damage material constitutive laws, and incorporate them into crystal plasticity framework to predict the creep-fatigue deformation behaviour, damage processes and the failure life of fcc polycrystals (e.g. Type 316 stainless steel processed by both conventional means and additive manufacturing). You will also perform cutting-edge high-temperature testing and characterisation experiments to validate the model prediction across different length-scales from the atomistic to macroscopic level. This project also comes with financial supports for attending international meetings/workshops.