Structural integrity of the gas turbine blades is of great concern. A set of methods and instruments is proposed to study the problems of the test loading of the industrial turbine blades. The approach aims to model the possible hightemperature, shock and irradiation impacts. The test loading is performed using the high-current relativistic electron beam. The developed methodology can be used for test and identification trails of the turbine blades. The experimental bench is designed to assist the thermographic measurements of the temperature dynamics in the blades. It also comprises the corresponding algorithms and software to perform the necessary calculations with.
The aluminum alloys D16 and AMg6 were irradiated using the high-current relativistic electron beam in vacuum. Intense electron irradiation of the materials modified their physical properties. The fractal character of the fracture surfaces’ images was studied. The change of the fractality is a distinguished descriptor of the materials modification. The characteristic ductile and brittle fractures are accompanied by the change of the fractal dimension.
Titanium VT22 alloy was irradiated in the TEMP-A accelerator with the high current electron beam with the energy of 350 keV, beam current of 2 kA, pulse length around 5 μs, and beam diameter of 45 mm. The irradiation was performed for three samples with 1 to 3 pulses separately. Numeric simulations of the temperature distributions in the targets were conducted using the thermoelastic ablation model. The microstructural and mechanical properties of the irradiated alloy were studied using microhardness testing, metallography and fractography analysis.
The industrial Titanium VT22 alloy was irradiated using the high-current pulsed electron beam (HCEB). HCEB method is an effective method to test the materials under extreme volumetric thermo-mechanical and irradiation conditions. The intense electron irradiation resulted in evolution of microstructural composition. It was found that formation of the β-phase, whereas nonirradiated material consists α+β-phases. The corresponding temperature field and mechanical displacement fields were calculated using the finite-element thermoelastic model.
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