Springtail-Inspired Triangular Laser-Induced Surface Textures on Metals Using MHz Ultrashort Pulses

Author:

Romano Jean-Michel1,Helbig Ralf2,Fraggelakis Fotis3,Garcia-Giron Antonio4,Werner Carsten2,Kling Rainer5,Dimov Stefan4

Affiliation:

1. Department of Mechanical Engineering, School of Engineering, University of Birmingham, Birmingham B15 2TT, UK e-mail:

2. Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research, Dresden 01069, Germany

3. ALPhANOV, Technological Centre for Optics and Lasers, Optic Institute of Aquitaine, Talence 33400, France; CELIA, University of Bordeaux, CNRS—CEA UMR5107, Talence 33405, France

4. Department of Mechanical Engineering, School of Engineering, University of Birmingham, Birmingham B15 2TT, UK

5. ALPhANOV, Technological Centre for Optics and Lasers, Optic Institute of Aquitaine, Talence 33400, France

Abstract

Considering the attractive surface functionalities of springtails (Collembola), an attempt at mimicking their cuticular topography on metals is proposed. An efficient single-step manufacturing process has been considered, involving laser-induced periodic surface structures (LIPSS) generated by near-infrared femtosecond laser pulses. By investigating the influence of number of pulses and pulse fluence, extraordinarily uniform triangular structures were fabricated on stainless steel and titanium alloy surfaces, resembling the primary comb-like surface structure of springtails. The laser-textured metallic surfaces exhibited hydrophobic properties and light scattering effects that were considered in this research as a potential in-line process monitoring solution. The possibilities to increase the processing throughput by employing high repetition rates in the MHz-range are also investigated.

Publisher

ASME International

Subject

Industrial and Manufacturing Engineering,Process Chemistry and Technology,Mechanics of Materials

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