Features of large deformation of neutrons radiated Armco iron

The peculiarities of plastic deformation of irradiated by neutrons Armco-iron were studied with using of deformation calorimetry, extensometry, transmission and scanning electronic microscopy methods. For unirradiated and irradiated Armco-iron the experimental curves 'true stress σ - true strain ε' were obtained. It is shown, that in case of irradiated material the plastic deformation is localized - it develops as deformation strips. The plastic deformation of irradiated Armco-iron accompanied by intensive deformation hardening. Thus the interrelation between σ and ε for the irradiated material is described by a parity: σ ∼ σ0 + k·ε1/2. (author)