Journal
INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES
Volume 45, Issue -, Pages 112-117Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijadhadh.2013.05.004
Keywords
Titanium and alloys; Surface morphology; Wedge tests; Laser pre-treatment
Funding
- German Federal Ministry of Education and Research (BMBF) [02PJ2090-2095]
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In this paper, the effect of pulsed laser irradiation (Nd:YVO4, 1064 nm) on the surface morphology and adhesion behaviour of Ti-6Al-4V was investigated. The surfaces were inspected by scanning electron microscopy (SEM), the chemical composition was obtained using X-ray photoelectron spectroscopy (XPS) and the adhesive properties were evaluated by means of wedge tests and floating roller peeling tests. The experiments revealed a homogeneous morphology consisting of a nano-structured oxide layer obtained within a particular set of laser parameters. The chemical investigation showed a considerable decrease of the contamination level on the surface compared to alkaline etching. The wedge test and floating roller peeling test showed that the nano-structured oxide layer formed after the laser process leads to a long-term stable adhesion behaviour. Using the laser pre-treatment the adhesion properties on titanium can be improved as compared to wet chemical pre-treatment processes like alkaline etching (Turco 5578) or anodising (NaTESi). (C) 2013 Elsevier Ltd. All rights reserved.
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