Radiation hardening revisited: role of intracascade clustering

摘要: Abstract Experimental observations related to the initiation of plastic deformation in metals and alloys irradiated with fission neutrons have been analyzed. The experimental results, showing irradiation-induced increase upper yield stress followed by a drop instability, cannot be explained terms conventional dispersed-barrier hardening because (a) grown-in dislocations are not free, (b) defect clusters rigid indestructible Orowan obstacles. A new model called ‘cascade-induced source hardening’ is presented where glissile loops produced directly cascades envisaged decorate so that they act as dislocation sources. breakaway which necessary pull away from clusters/loops decorating it. magnitude has estimated found good agreement measured initial neutron copper.