Dislocation structure of tungsten irradiated by medium to high-mass ions

Abstract Single crystalline tungsten was irradiated by the medium-mass ion Si with 7.5 MeV and high mass-ion W 20.3 up to a calculated peak damage level of 0.04 dpa 0.5 dpa. The obtained dislocation structure zone investigated transmission electron microscopy systematically compared each other. Bright-field kinematical images were taken under four different two-beam diffraction conditions g = −200, 020, −110, 110 close [100] axis. observed depth position is in good agreement SRIM profiles. structures at region because there levels are comparable. In both irradiations (Si W), similar. At low loops dislocation-loop clusters found. size W-irradiated sample 20% higher than for Si-irradiated sample. network consisting chains lines found irradiations. line density about 12% Through comparison profiles it that transition from an ordered takes place 0.08–0.1 Despite large differences mass irradiation energy very