Comparison Of The Properties And Structure Of Ti Samples Obtained From Fine-grained Powder By Vacuum Pressureless Sintering And By High-pressure Sintering As A Result Of Impact At Low Temperature

Titanium is one of the most important materials for aviation and space industry. High-strength parts can be obtained by powder metallurgy methods from fine-grained powder. However, pressureless sintering of titanium powders requires high temperature (1200-1300 °C) and long holding (2-4 hours). To obtain high-density samples at lower temperatures, of interest is the method of a vacuum compaction of a porous briquette under the action of an impact load, at which the pressure reaches values of 1100-1300 MPa, and the compaction process lasts 0.003-0.005 s. In this study, titanium samples were obtained using two technologies: pressureless sintering of porous briquettes at a temperature of 1300 °C with an isothermal holding time of 80 min, and impact compaction at temperatures of 750, 850 and 950 °C with an isothermal holding time of 30 min before impact. The density, mechanical properties and microstructure of samples after their compaction by different methods were studied.