Peculiarities of the fracture upon tensile deformation of hypoeutectic silumin samples after irradiation with an intensive pulse electron beam digital image correlation method

Abstract

Abstract The deformation behavior of non-irradiated and irradiated (with an intense pulsed electron beam) samples of hypoeutectic silumin ASTMB179-92A has been investigated. The distribution of localized plasticity foci in the near-surface layers of the samples has been studied. The dependence on the state of the material (non-irradiated and irradiated samples) and the distribution of deformation fields on the surface of silumin ASTMB179-92A under tension have been revealed. A correlation between deformation stages and the evolution pattern of spatial foci of the localized deformation has been established, and the staging of deformation curves has been revealed on the non-radiated samples. It has been shown that staging of the deformation process does not manifest itself on deformation curves of the irradiated samples. Deformation curves are characterized by a parabolic functional dependence σ=f(ε). It has been established that irradiation with an intense pulsed electron beam leads to hardening of samples, and fracture is observed at higher values than on non-radiated samples. A significant deformation localization in the region corresponding to the nucleation of the crack appears at stresses close to brittle failure of samples under tension.