Modeling and Simulation of Pore Formation in a Bainitic Steel During Creep

Abstract In the field of power engineering, where materials are subjected to high pressures at elevated temperatures for many decades, creep-resistant steels put work. Their service life is still, however, finite, as changes in their microstructure can merely be mitigated and not avoided. Creep cavitation one those and, cases, ultimately causes failure by rupture. this work, a model proposed simulate nucleation growth cavities during creep. This exclusively physics-based uses modified forms Classical Nucleation Theory Onsager Extremum Principle newly developed Kampmann–Wagner framework. The validated on P23 steel which underwent creep rupture experiments 600 °C stresses 50, 70, 80, 90 100 MPa times up 46000 hours. predicts qualitatively shape prevalence different sites microstructure, quantitatively number density, size phase fraction contributing reduction density. Finally, we find good agreement between simulation experimental results especially low longer times.