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It has been formulated a rather simple model of martensitic unelasticity due to martensitic transformations of the first order. It is based on the idea that a martensitic reaction comes out as a mechanism of unelastic micro-strain. An equation describing the variation of the size of martensite crystals in the direct and reverse reactions has been proposed. Kinetics of these reactions is determined by two external factors: temperature and stress. Macroscopic strain is calculated by orientation averaging of micro-strains. There are given examples of simulation of mechanical characteristics of a model material. A satisfactory correspondence has been established between the calculated and actually observed effects.

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L'archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau recherche, publiés ou non, émanant des établissements d'enseignement et de recherche français ou étrangers, des laboratoires publics ou privés. Structure-Analitycal Theory of Martensitic Unelasticity V. LikhachevTo cite this version: Abstract. The article presents a theory able to calculate various phenomena of martensitic unelasticity as well as of dislocation plasticity. The theory is based on the structure-analytical conception. The developed lnethodology accounts for such fundamental phenomena as kinetics of martensite crystals growth; influence of temperature, stress and neutron radiation; influence of nonhomogeucons strain of dislocation origin and its dependence on diffusion and radiation damage, etc. The developed theory allows to predict tnechanical behaviour of crystals under an arbitrary themoniechanical and radiation effect thus making possible to solve numerous applied problems.

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