Fabrication of multi-scale periodic surface structures on Ti-6Al-4V by direct laser writing and direct laser interference patterning for modified wettability applications

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • D. Huerta-Murillo - , Technical University of Madrid (Author)
  • A. I. Aguilar-Morales - , Fraunhofer Institute for Material and Beam Technology (Author)
  • S. Alamri - , Fraunhofer Institute for Material and Beam Technology (Author)
  • J. T. Cardoso - , Technical University of Madrid (Author)
  • R. Jagdheesh - , Technical University of Madrid (Author)
  • A. F. Lasagni - , Chair of Laser-based Manufacturing, Fraunhofer Institute for Material and Beam Technology (Author)
  • J. L. Ocana - , Technical University of Madrid (Author)

Abstract

In this work, hierarchical surface patterns fabricated on Ti-6Al-4V alloy combining two laser micro-machining techniques are presented. The used technologies are based on nanosecond Direct Laser Writing and picosecond Direct Laser Interference Patterning. Squared shape micro-cells with different hatch distances were produced by Direct Laser Writing with depths values in the micro-scale, forming a well-defined closed packet. Subsequently, cross-like periodic patterns were fabricated by means of Direct Laser Interference Patterning using a two-beam configuration, generating a dual-scale periodic surface structure in both micro- and nano-scale due to the formation of Laser-Induced Periodic Surface Structure after the picosecond process. As a result a triple hierarchical periodic surface structure was generated. The surface morphology of the irradiated area was characterized with scanning electron microscopy and confocal microscopy. Additionally, static contact angle measurements were made to analyze the wettability behavior of the structures, showing a hydrophobic behavior for the hierarchical structures. (C) 2017 Elsevier Ltd. All rights reserved.

Details

Original languageEnglish
Pages (from-to)134-142
Number of pages9
JournalOptics and lasers in engineering
Volume98
Publication statusPublished - Nov 2017
Peer-reviewedYes

External IDs

Scopus 85021454367

Keywords

Keywords

  • Direct laser interference patterning, Direct laser writing, Laser material processing, Laser-induced periodic surface structures, Ti-6Al-4V