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Technical Brief

Springtail-inspired triangular laser-induced surface textures on metals using MHz ultrashort pulses

[+] Author and Article Information
Jean-Michel Romano

Department of Mechanical Engineering, School of Engineering, University of Birmingham, B15 2TT Birmingham, United Kingdom
jean-michel.romano@gadz.org

Ralf Helbig

Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research, 01069Dresden, Germany
helbig@ipfdd.de

Fotis Fraggelakis

ALPhANOV, Technological Centre for Optics and Lasers, Optic Institute of Aquitaine, RueF.Mitterrand, 33400 Talence, France; CELIA, University of Bordeaux - CNRS - CEA UMR5107, 33405 Talence, France
fotis.fraggelakis@alphanov.com

Antonio Garcia-Giron

Department of Mechanical Engineering, School of Engineering, University of Birmingham,B15 2TT Birmingham, United Kingdom
AXG616@bham.ac.uk

Carsten Werner

Max Bergmann Center of Biomaterials, Leibniz Institute of Polymer Research, 01069Dresden, Germany
werner@ipfdd.de

Rainer Kling

ALPhANOV, Technological Centre for Optics and Lasers, Optic Institute of Aquitaine, RueF.Mitterrand, 33400 Talence, France
Rainer.KLING@alphanov.com

Stefan Dimov

Department of Mechanical Engineering, School of Engineering, University of Birmingham,B15 2TT Birmingham, United Kingdom
s.s.dimov@bham.ac.uk

1Corresponding author.

ASME doi:10.1115/1.4043417 History: Received November 08, 2018; Revised March 29, 2019

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.

Copyright (c) 2019 by ASME
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