@ARTICLE{Oliferuk_Wiera_Thermodynamic_2002,
 author={Oliferuk, Wiera and Raniecki, Bogdan},
 number={No 3},
 journal={Archives of Metallurgy and Materials},
 pages={261-273},
 howpublished={online},
 year={2002},
 publisher={Institute of Metallurgy and Materials Science of Polish Academy of Sciences},
 publisher={Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences},
 abstract={The stored energy e, due to plastic deformation is defined as the change in internal energy measured at stress free state of material, and it characterises the cold-worked state. Both cold-worked state and the stored energy at each instant of deformation depend on the deformation history. Therefore, the instantaneous rate de,f dwP of energy storage seems to be an appropriate measure of the energy conversion process (wP is the work of plastic deformation). The rate of energy storage is important characteristic of the whole energy storage processes. It is a macroscopic quantity that is influenced by many microscopic mechanisms. Each of them is described by the separate internal paramenter H;. In mathematical description, the stored energy is a function of H,, H2, H3 •.• , H,,. Since there exist couplings between different mechanisms the function can not be, in general, written in the from: Le'..° (H;). The similar remark concerns also the energy storage rate. i= I The present paper is devoted an answer if it is possible to distinguish the influence of the change in given internal parameter on the rate of energy storage. In order to find the answer the theoretical analysis of energy storage rate on the basis of phenomenological thermodynamics of plastic deformation was done. The theoretical description of the experimental method od stored energy determination is presented. The results of the analysis have been used to support the additive partitioning of the resultant rate of the energy stored and to show experiment which allows distinguishing the particular components. Each component represents the specific microscopic mechanism. The analysis of preliminary experimental data arrived at the conclusion that in the initial stage of plastic deformation of polycrystalline metal at least two components of the energy storage rate exist. One of them is associated with the rise of dislocation density, and another one is related to the internal stress field due to elastic accommodation of incompatible strains in the vicinity of grain boundaries.},
 type={Article},
 title={Thermodynamic Analysis of Energy Storage Rate during Uniaxial Tensile Deformation of Polycrystalline Metal},
 URL={http://czasopisma.pan.pl/Content/131864/PDF-MASTER/4_METALLURGY_47_3_2002_Oliferuk_THERMODYNAMIC.pdf},
}