Porosity and microstructure in pulsed Nd:YAG laser welded Ti6Al4V sheet

- The overlapping factor of pulsed laser welding is used to help understand the correlation between welding parameters and the quality of pulsed laser welded joint.
- Increasing overlapping factor is an effective way of minimizing or even totally eliminating pores.
- A way to evaluate the porosity susceptibility of a specific welding condition prior to actual welding process is presented.
- The microstructure and microhardness gradients decrease with the increase in overlapping factor.