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Information × Registration Number 0222U001920, 0121U112445 , R & D reports Title Control of functional properties of shape memory alloys and nanostructures on its base popup.stage_title Head Kosohor Anna O., Доктор фізико-математичних наук Registration Date 04-02-2022 Organization Kosohor Anna О. popup.description2  The peculiarities of two Landau-type theories of ferroelastic phase transitions have been analyzed. It has been shown that the predictions of the Landau–Devonshire theory, which disregards the third-order term in power expansion of Gibbs free energy, contradict the experimental data, while the results of the symmetry conforming Landau theory, which takes into account this term, are in agreement with experimental data. The internal elastic deformation induced by an ensemble of nanoparticles in the crystal lattice of shape memory alloy (SMA) has been introduced as a main parameter in the theory of the superelastic behavior of SMA-nanoparticle composites. It is shown that the internal deformations caused by nanoparticles can increase the value of superelastic deformation, strengthen the crystal lattice of alloy and can lead to high-temperature elasticity of SMA composites. Product Description popup.authors Kosohor Anna O. popup.nrat_date 2022-03-09 Close