Registration Number
0223U005744,
0122U002114
, R & D reports
Title
Creation of porous titanium materials with high damping properties
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Head
Stasiuk Oleksandr O., Кандидат технічних наук
Registration Date
30-12-2023
Organization
Institute of Metal Physics. G.V. Kurdyumov of the National Academy of Sciences of Ukraine
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The report consists of: 144 pages, 54 figures, 9 tables, 137 citations.
The following research methods were used: laser diffraction analysis, scanning electron microscopy, mechanical tests, RFDA non-destructive impulse excitation method, Hopkinson method for high-speed tests
Porous titanium materials with different proportions of pores were produced, and their mechanical and elastic characteristics were investigated. Porous titanium materials with different proportions of pores were produced, and their mechanical and elastic characteristics were investigated. The study of elastic properties showed that with an increase in porosity from 42% to 58%, the elastic properties of porous materials change greatly: the Young's modulus decreases from 45 GPa to 16 GPa, and the damping capacity of the material increases from 1.8 to 2.7.
It was found that porous titanium materials are sensitive to the rate of deformation when the latter exceeds 103 s−1. However, the dependence of the strain rate sensitivity on the porosity of these samples was ambiguous, probably due to the effect of the presence of gases trapped in the pores.
Synthesis processes using two approaches (using elementary powder systems and pre-alloyed powders) to create a porous Ti-6Al-4V titanium alloy were investigated. Samples with residual porosity of 40-60% and typical microstructures were obtained by both methods. The mechanical behavior of porous Ti-6Al-4V alloy materials during a compression test at quasi-static and high strain rates was studied. Differences in the mechanical behavior of materials obtained by different methods are shown, which is associated with the additional influence of the number of technological operations during the synthesis of porous materials.
Based on the comprehensive analysis of the obtained results, a scheme describing the deformation mechanism of the synthesized and investigated samples of porous materials is proposed.
Product Description
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Oryshych Denys V.
Pakula Dmytro L
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2023-12-30
