Laser drilling of titanium

摘要

In this work some of the main results dealing with laser drilling of titanium are reported. After the presentation of the state of the art of the present issue, three specific cases were defined and discussed. In the first part the main results concerning the laser drilling using a nanosecond laser source was descrived, reporting the principal performances of the process as well as the heat damages of the material machined; in the second discussion a comparison among the properties of two titanium plates, having different initial microstructure, was proposed: it was shown that different initial properties can affect significantly the final performances of the material machined, like the thermal process can do. Finally, the third discussion reports some preliminary results concerning the laser drilling with ultrashort pulses; here, the limitation of the thermal damages can be seen in the sensible reduction in the melted material produced and in improving the hole precision and quality.