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Information × Registration Number 0224U001435, 0121U108380 , R & D reports Title Development of technological bases of melting heat-resistant titanium alloys of new generation by electron-beam melting and study of their structure, mechanical properties and the ability to weld popup.stage_title Head Akhonin Serhii V., Доктор технічних наук Registration Date 23-01-2024 Organization E. O. Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description2 Within the framework of this topic, the technology of electron beam melting (EPP) of heat-resistant titanium alloys of the new generation with different content of alloying elements and the technology of obtaining their deformed semi-finished products have been developed. The dependence of the structural-phase state of semi-finished heat-resistant alloys on the regimes of their thermo-deformation treatment is determined, and it is shown that deformation treatment from the temperature corresponding to the upper part of the region of existence of (α+β)-phases ensures obtaining in the metal a mixed globular-plate structure with average grain size of the α-phase is 20-40 μm and the allocation of dispersed silicides (Zr,Ti)5Si3 and (Ti,Zr)3Si, which are evenly distributed between the α-plates and along the grain boundaries of the α-phase. Such a structure ensures an increase in the plasticity of the material at room temperature by up to 9% and provides high strength indicators both at room (1135 MPa) and at working temperatures of 600оC (750 MPa), which exceeds the best world analogues. The modes of electron beam welding (EBW) and argon arc welding of heat-resistant titanium alloys with the use of preheating up to 400°С and ELB with local heat treatment (LHT) have been developed. It was established that preheating up to 400°С and LHT at 750°С effectively prevent the formation of cracks in welded joints. It was established that in order to ensure a homogeneous uniform structure in a welded joint made of heat-resistant titanium alloys, it is necessary to apply additional furnace treatment. The implementation of the developed technologies provides the possibility of creating a closed domestic metallurgical cycle for the production of semi-finished products from heat-resistant titanium alloys, which will solve the problem of import substitution in the aerospace complex, energy and chemical engineering. Product Description popup.authors Erokhin Oleksiy G. Ishchuk Yuriy Serhii V. Akhonin Bilous Valerii Yu. Berezos Volodymyr O. Vrzyzewski Eduard L. Horodnichenko Victoria Kovalenko Inna Grigorivna Kotenko Oleksandr Mykhaylova Nataliya Pikulin Oleksandr M. Pashinsky Volodymyr Petrichenko Iryna K. Petushkov Igor Prylutsʹkyy Oleksandr Radchenko Leonid Rukhanskyi Serhii V. Severyn Andrii Yu. Selin Roman V. Standarchuk Tetyana Tishchenko Olexandr Scgwab Sergii Yushchenko Andriy popup.nrat_date 2024-01-23 Close