Memorias de investigación
Research Publications in journals:
Wettability modification of laser-fabricated hierarchical surface structures in Ti-6Al-4V titanium alloy
Year:2019

Research Areas
  • Mechanical aeronautics and naval engineering

Information
Abstract
In the present work, a study of laser-based surface structuring of aerospace-grade titanium alloy (Ti-6Al-4V) with subsequent ageing by employing two different storage methods is undertaken. The titanium alloy samples were patterned using UV-ns and IR-fs pulsed lasers in a two-step process to fabricate bio-inspired hierarchical structures. The resulting surface structure consisted in regular periodic square-shaped micro-pillars covered by 810?nm-periodic LIPSS. After the laser processing the samples were kept in two different storage conditions: exposed to ambient air and inside polyethylene bags. The polyethylene bags were found to be beneficial for the surface ageing of laser-fabricated titanium surfaces, increasing the ageing time when compared to ageing by exposure to ambient air. Hierarchical surface topographies exhibited higher water-repellency when compared to non-hierarchical structures. Especially, hierarchical structures reached a hydrophobic state with water contact angle over 160° after 3?weeks storage in polyethylene bags. The micro-structured surfaces were characterized by using confocal microscopy, scanning electron microscopy, static contact angle measurements and X-ray photoelectron spectroscopy.
International
Si
JCR
Si
Title
Applied Surface Science
ISBN
0169-4332
Impact factor JCR
4,439
Impact info
Datos JCR del año 2017
Volume
463
10.1016/j.apsusc.2018.09.012
Journal number
From page
838
To page
846
Month
ENERO
Ranking
1/19 (Material science, coatings and films)
Participants

Research Group, Departaments and Institutes related
  • Creador: Grupo de Investigación: Grupo de Investigación en Ingeniería y Aplicaciones del Láser