"Hydrogen-Induced Dislocation Nucleation and Plastic Deformation of 〈00" by Jiaqing Li, Ziyue Wu et al.
The grain boundary (GB) plays a crucial role in dominating hydrogen-induced plastic deformation and intergranular failure in polycrystal metals. In the present study, molecular dynamics simulations were employed to study the effects of hydrogen segregation on dislocation plasticity of a series of symmetrical tilt grain boundaries (STGBs) with various hydrogen concentrations. Our study shows that hydrogen both enhances and reduces dislocation nucleation events from STGBs, depending on different GB structures. Specifically, for (Formula presented.) STGBs, hydrogen does not affect the mode of het...
Source: uow.edu.au