https://doi.org/10.1140/epjd/s10053-021-00308-z
Regular Article – Optical Phenomena and Photonics
Comprehensive ablation study of near-IR femtosecond laser action on the titanium-based alloy Ti6Al4V: morphological effects and surface structures at low and high fluences
1
Institute of General and Physical Chemistry, Belgrade, Serbia
2
Department of Belgrade Polytechnic, The Academy of Applied Technical Studies Belgrade, Belgrade, Serbia
3
VINCA Institute of Nuclear Sciences - National Institute of the Republic of Serbia, University of Belgrade, Belgrade, Serbia
4
National Institute for Laser Plasma and Radiation Physics – Bucharest, Magurele, Romania
Received:
31
March
2021
Accepted:
9
November
2021
Published online:
5
January
2022
The surface of a titanium-based alloy Ti6Al4V was subjected to modifications by a near-IR femtosecond Ti:Sapphire laser, emitting at 775 nm pulses of 200 fs duration, in single-pulse and multi-pulse regimes, with up to 400 accumulated pulses, and pulse energies ranging from 2.5 to 250 
J. The whole range of induced effects is presented, from gentle ablation and pattern occurrence to substantial crater formation. Very observable laser-induced parallel periodic surface structures are reported, appearing both within the damage spot area, with low fluences, and at the peripheries of the craters, with higher fluences—but also on crater walls, and inside the crater structures. Damage threshold fluences 
and the incubation factor 
were also determined.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021
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