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

摘要

The deformation behavior of non-irradiated and irradiated(with an intense pulsed electron beam)samples of hypoeutectie 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 o”=f(8).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.