CC BY 4.0 UnportedSchnell, GeorgLund, HenrikBartling, StephanPolley, ChristianRiaz, AbdullahSenz, VolkmarSpringer, ArminSeitz, Hermann2022-02-232022-02-232021https://oa.tib.eu/renate/handle/123456789/8067https://doi.org/10.34657/7108This study presents a detailed characterization of self-organized nano- and microstructures on Ti6Al4V evoked by different scanning strategies and fluences with a 300 fs laser operating at a laser wavelength of 1030 nm. The resulting surface morphology was visualized via field emission scanning electron microscopy (FEG-SEM) images of the surface and cross-sections. X-ray diffraction (XRD)-analysis was performed to analyse changes in crystal structures. The chemical surface composition of the near-surface layer was determined by X-ray photoelectron spectroscopy (XPS). Results show a significant influence of heat accumulation while processing with high laser repetition rates on the formation, crystallinity and chemical composition of self-organized structures depending on the scanning strategy. The ablation with different laser scanning strategies led to varying dynamics of growth-mechanisms of self-organized structures, formation of intermetallic phases (Ti3Al), sub-oxides and oxides (Ti6O, TiO) as well as ions (Ti3+, Ti4+) in surface layer reliant on applied fluence. Furthermore, investigations revealed a heat-affected zone up to several micrometers in non-ablated material. © 2021 The Authorsenghttps://creativecommons.org/licenses/by/4.0/530660670Heat accumulationHeat-affected zoneScanning strategiesSelf-organized nano- and microstructuresTitaniumArticle