Abstract :
Titanium was laser nitrided by means of free-electron laser irradiation in pure nitrogen atmosphere. The variation of pulse frequency and
macropulse duration of the free electron laser resulted in d-TiNx coatings with different thickness and different micro- and macroscopic
morphologies. The coatings revealed, characteristic values for hardness, roughness and crystallographic texture, which originate from the growth
mechanism, the solid–liquid interface energy and the strain. Further investigations showed that the dendritic growth is beginning at the surface and
that the alignment of dendrites is normal to the surface. A correlation of the texture with the time structure of the laser pulses was found. Numerical
simulations were performed and compared with the experimental results. The simulations can explain the experimental results
