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Information × Registration Number 0220U104583, 0119U000169 , R & D reports Title Development of methodology fractodiagnostication taking into account the structural heterogeneity of high-strength polycrystal metals for military-industrial and oil-and-gas complexes. popup.stage_title Head Bishchak Roman T, Кандидат технічних наук Registration Date 23-12-2020 Organization Ivano-Frankivsk National University of Oil and Gas popup.description2 Object of research: structural heterogeneity, mechanisms of deformation and fracture of high-tensile titanium alloys VT22, VT23, high-tensile steel pipelines, as hierarchical systems in which the processes of deformation and destruction processes occur at different scales. A method of automated fractodiagnostics of high-strength titanium alloys and steel pipelines has been developed, which allows to identify elements of the network of viscous separation pits, to determine their number, shape and specific weight of coalescence within the analyzed area. A method for identifying viscous separation pits by processing a digital image of thefracture surfaces has been proposed. Using the developed method of shock-oscillating load, new data were obtained of increase the impact strength, crack resistance, hardness of sheet high-strength two-phase titanium alloys. These results can be directly used in the design of modern equipment and special equipment, including protective plates of modern bulletproof vests. Tests of the influence of dynamic non-equilibrium processes on the strength and plastic properties of titanium alloys and high-strength tubular steels in the initial state and after the previous shock-vibration load are carried out. The geometries of the structure of structures and fractures of the studied materials are compared, the influence of inhomogeneity of structures on resistance to destruction is revealed, the essential role of cooperative influence of different-scale structures on the evolution of destruction and its energy intensity is established. This allowed us to formulate objective requirements for the allowable heterogeneity of structures that provide a high level of resistance to fracture. Optimal modes of shock-oscillating load are offered, which allow to provide high operational properties of plates of body armor in real conditions. Product Description popup.authors Ivanov Oleksandr O Bishchak Roman T Vytvytskyi Vasyl S Voronych Artur R Hrytsanchuk Andrii V Dozorskyi Vasyl H Lutsak Dmytro L Panevnyk Denys O Pyrih Taras Yu Riabko Yurii S Senychak Vladyslav V Stasiuk Roman B Uhrynovskyi Andrii V Faflei Oleh Ya Tsykh Vitalii S Chaban Nazarii I Yatsyniak Ivan I popup.nrat_date 2020-12-23 Close