Phase field analysis and simulation for remaining creep life assessment of H13 steel

A traditional phase field model was used to develop and improve the remaining creep life assessment of H13 steel. In this modified phase field model, the microstructure was characterized by order parameter ϕ. The changes of ϕ were considered to be a function of subgrain formation or growth during creep. Due to the linear relationship between yield strength and hardness in steel, hardness was used in equation of motion for studying material flow at steady state creep. Creep tests consist of fracture and 1% creep ductility, were conducted according to ASTM E139 at 500, 550 and 600 °C and stress levels of 872-926.5 MPa. The mechanical properties and microstructural characteristics of H13 steel were examined and used through simulation process.