Helium nano-bubbles in copper thin films slows down creep under ion irradiation

Neutron irradiation of structural materials in nuclear applications is accompanied with a variety of microstructural changes including the generation of helium nano-voids at high doses. When operating under stress, irradiation creep is taking place, leading to change of dimensions of components, as well as relaxation of the springs or screw torque. These distortions may have important implications on the performance of the nuclear reactor. …