The present study investigates the relationships and parameter interactions between three controllable variables (lamp current, pulse frequency and air pressure) on hole taper in micro-drilling operations, in order to assess the effect of the different process parameters and also material properties in laser micro-drilling operations. Micro-drilling experiments have been conducted for Gamma-Tit...

Metallic material systems play a key role in meeting the stringent weight and durability requirements for reusable launch vehicle (RLV) airframe hot structures. Gamma titanium aluminides (γTiAl) have been identified as high-payoff materials for high-temperature applications. The low density and good elevated temperature mechanical properties of γ-TiAl alloys make them attractive candidates for ...

Using a laser velocity interferometer, wave profiles were recorded in porous (porosity 30%) nickel aluminide samples. Data on shock compressibility obtained. An abnormally high compaction was found, manifested the intersection of Hugoniots solid and samples at pressure 28 GPa, which indicates phase transition. Keywords: waves, Hugoniot, transitions, Doppler interferometers, intermetallides.

The article deals with the effect of irradiation Si+ ions on phase transformations in Ti–Al system during thermal annealing. An aluminum film a thickness 500 nm was deposited VT1-00 titanium samples by magnetron sputtering, followed ion implantation. Samples before and after Si were annealed vacuum 10?4 Pa temperature range 600–1000 °C. It established that implantation reduces dissolution Al ?-...