| Abstract Scope |
The formation of cavities and the impact of hydrogen on materials under radiation damage are critical in materials science, affecting structural integrity. Early studies highlighted helium's role in cavity nucleation and growth, but the combined effects of helium and hydrogen remain unclear. In ferritic/martensitic alloys subjected to triple ion beam irradiations, cavities typically have a helium core with a hydrogen shell, stable at 800 K. Calculations suggest the binding energy of hydrogen to cavity surfaces is 0.65-0.75 eV, with an estimated de-trapping temperature of 360 K, which contradicts experimental observations. We review recent progress in computer simulations on hydrogen’s synergistic effects on cavity formation, considering factors like strain/stress fields, He/V ratio, migration energy, bubble size, and helium density. Future studies aim to reconcile experimental results with simulations to enhance understanding of hydrogen’s impact on cavity formation. |