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Information × Registration Number 0222U003397, 0117U001261 , R & D reports Title Investigation of the peculiarities of structural and phase transformations in metal of ingots, welds and deposited layer of high-strength steels and alloys produced by additive methods using concentrated energy flows. popup.stage_title Head Grigorenko Georgy M., Доктор технічних наук Registration Date 18-03-2022 Organization E.O.Paton Elektric Welding Institute National Academy of scinces of Ukraine popup.description2  Using the CALPHAD method, mathematical models were created and computer modeling of the temperature, stress-strain and structural-phase state of the deposited layer of steels 09Г2С, S460M, titanium alloy Grade2, obtained by additive methods. Modeling of multilayer 3D construction and thin-walled cylindrical shells was carried out and criteria for material selection for the additive process were established. The structure of products obtained by the method of additive technology with xBeam 3D-printer using titanium wire Grade 2 is established. It is shown that the primary structure of the product is of the cast type, with the predominance of coaxial grains. The secondary structure of needles type is represented by two phases: ά-martensitic (fcc ~ 99.0 wt.%) and β - high-temperature (with BCC lattices ~ 1.0 wt.%). Proven low loss of aluminium during wire deposition using xBeam 3DMetalPrinting technology. It is established that plasma-induction layer cultivation allows to obtain a perfect single-crystal structure of tungsten with low-angle boundaries and crystallographic orientation, which was set by the seed crystal. The crystallographic perfection of monocrystalline tungsten ingots obtained by additive technology by the method of plasma - induction layer cultivation at different process speeds (17… 70 mm / min) has been established. The ingot is a single-crystalline body with crystallographic orientation, in accordance with the seed crystal; the thickness of the growing layers is 2… 3 mm; the structure of the layers is homogeneous, defects and pores are not observed; the calculation of the misorientation angles (θ) of the elements of the substructure showed that it varies within 0.294°… 1.923°, which does not exceed the allowed value (<3 °). The influence of additive modifiers on the formation of the structure and properties of the weld metal of high-strength low-alloy steels type 14HGNDC is established. Product Description popup.authors Berdnikova Olena M. Kostin Valerii A. Тunik Alla Y. popup.nrat_date 2022-03-18 Close