Phase-field, dislocation based plasticity and damage coupled model: Modelling and application to single crystal superalloys

In the present work, we propose a novel model coupling phase-field, dislocation density based plasticity and damage. The governing equations are constructed on evolutions of mobile immobile dislocations. Mechanisms including multiplication, annihilation, mobile–immobile transfer due to interactions block interfaces incorporated in model. Especially, “swallow-gap” problem surrounding coarsened second phase, which often appears phase-field coupled simulations, is solved Moreover, phenomenon cutting into phase during tertiary creep, has rarely been considered previous simulations single crystal superalloys, successfully captured with long range stresses induced by external loading, coherent interface misfit, plastic activity damage, as well short antiphase boundary, line tension forest trapping dynamics High temperature 〈001〉 creep superalloys under 200 MPa 350 conducted using compared experiments. results show that simulated microstructures, dislocations properties principally agree experiments whole stage, terms both microscopic macroscopic features.