Atomistic Study on the Microscopic Mechanism of Grain Boundary Embrittlement Induced by Small Dense Helium Bubbles in Iron
The helium bubbles induced by 14 MeV neutron irradiation can cause intergranular fractures in reduced activation ferritic martensitic (RAFM) steel, which is a candidate structural material for fusion reactors. In order to elucidate the susceptibility of different grain boundaries (GBs) to helium-ind…