The impact of plasticity and grain boundaries on hydrogen-induced damage in nickel base alloys – PlaGrHyD

This work aims to evaluate the impact of plasticity and the nature of grain boundaries on hydrogen-induced brittle fracture mechanisms in nickel base alloys. In this context, and using innovative multiscale numerical and experimental approaches, we will interrogate in the presence of hydrogen, the implication of the mechanisms of plasticity coupled with the nature of the grain boundaries on the processes leading to the decrease of mechanical properties of metallic materials. The purpose of the project is the establishment of a damage map associating the modes of fracture, the character of the grain boundaries and the hydrogen-plasticity interactions.