Stress–strain curve and stored energy during uniaxial deformation of polycrystals

The subject of this paper is an attempt to obtain information about the energy stored during plastic deformation from experimentally measured stress–strain curve. tical analysis of the stress–strain curve for elastic-perfectly plastic polycrystalline material has shown that only the part of stored energy can be calculated from the stress–strain curve. This part is the energy stored during non-homogeneous plastic deformation. sults of such calculation have been compared with the total stored energy determined experimentally. It has been shown that part of total stored energy related to non-homogeneous plastic deformation of investigated materials is much lower than that corresponding to homogeneous one.