Role of Initial Surface Roughness in LIPSS Formation during Picosecond Laser Structuring of Titanium Alloy

Druzhinin P, Fomicheva I, Souza DS, Tesler A, Sarau G, Leuchs G, Christiansen S (2026)

Publication Type: Conference contribution

Publication year: 2026

Journal

Procedia CIRP Curran

Publisher: Elsevier B.V.

Book Volume: 143

Pages Range: 792-795

Conference Proceedings Title: Procedia CIRP

Event location: Heinrich-Lades-Halle, DEU

DOI: 10.1016/j.procir.2026.07.166

Abstract

This study investigates the influence of surface roughness on the LIPSS formation on Ti6Al4V processed by a 1064 nm picosecond laser. Surface roughness significantly affects LIPSS uniformity when the ablation depth is insufficient to eliminate the initial topography and surface defects such as scratches. Under high pulse repetition rates (≥ 500 kHz) and single-pulse fluence levels around 1 J cm⁻², laser processing can lead to microhole formation along surface defects due to increased heat accumulation in the interaction zone. Therefore, achieving homogeneous LIPSS across the entire surface requires an appropriate combination of single-pulse fluence Fs and effective fluence dose Feff to ensure sufficient ablation depth. This result is particularly important for practical LIPSS applications, as it enables uniform and reproducible surface structuring without additional mechanical polishing.

Authors with CRIS profile

Alexander Tesler Lehrstuhl für Biophysik Gerhard Leuchs Lehrstuhl für Experimentalphysik

Involved external institutions

Fraunhofer-Institut für Keramische Technologien und Systeme (IKTS) DE Germany (DE) Universität Bayreuth DE Germany (DE) Innovations-Institut für Nanotechnologie und korrelative Mikroskopie e.V. (INAM) / Institute for Nanotechnology and Correlative Microscopy DE Germany (DE)

How to cite

APA:

Druzhinin, P., Fomicheva, I., Souza, D.S., Tesler, A., Sarau, G., Leuchs, G., & Christiansen, S. (2026). Role of Initial Surface Roughness in LIPSS Formation during Picosecond Laser Structuring of Titanium Alloy. In Procedia CIRP (pp. 792-795). Heinrich-Lades-Halle, DEU: Elsevier B.V..

MLA:

Druzhinin, Petr, et al. "Role of Initial Surface Roughness in LIPSS Formation during Picosecond Laser Structuring of Titanium Alloy." Proceedings of the 14th CIRP Conference on Photonic Technologies, LANE 2026, Heinrich-Lades-Halle, DEU Elsevier B.V., 2026. 792-795.

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