► Voids growth and interaction in single crystal silicon cubes are investigated.
► Two fracture behaviors are observed: brittle cleavage and ductile void coalescence.
► The brittle–ductile transition depends on initial inter-void ligament distance.
► Initial inter-void ligament distance increase with void radius increasing.
► Nano-ductility in single crystal Si is due to vacancies diffusion in the ligament.
Source:Computational Materials Science