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Laser treatments of titanium surfaces In different atmospheres for Improved adhesion properties

Haubrich, Jan and Schulze, Karola and Hausmann, Joachim (2014) Laser treatments of titanium surfaces In different atmospheres for Improved adhesion properties. Euro Hybrid Materials and Structures 2014, 10.-11. April 2014, Stade.

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Abstract

We present a first study on the effects of the ambient gases of a laser pre-treatment on the interface and bond strength to a thermoplastic polymer, polyetheretherketone (PEEK). The pretreatments of titanium TiAl3V2.5 surfaces were performed with a pulsed Nd:YAG laser in air, oxygen, nitrogen and argon. SEM investigations showed macro-structuring at the micron scale and superimposed fine nanostructuring. We characterized the initial and residual bond strengths by means of single-lap shear experiments prior and after degradation for 7 days in 80°C hot H2O, respectively. The initial strengths of the surfaces laser treated in air, oxygen and nitrogen were comparable at around 77 MPa, whereas for samples pretreated in Argon slightly lower strengths of 676 MPa were obtained. After degradation, the absolute strength loss varied from 11% (air) to 24% (Ar). While laser treatment in reactive gases still led to comparably high strengths (~64 MPa), the pre-treatment in Ar caused a significant loss of the residual strength (52 MPa). The shear strengths and degradation results correlated with changes in the nanostructures created by the laser irradiation, which was substantially less in case of argon compared to those obtained in reactive gases. The presence of titanium oxides was detected by EDX on all four surfaces.

Item URL in elib:https://elib.dlr.de/91720/
Document Type:Conference or Workshop Item (Speech)
Title:Laser treatments of titanium surfaces In different atmospheres for Improved adhesion properties
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Haubrich, JanJan.Haubrich (at) dlr.deUNSPECIFIED
Schulze, Karolakarola.schulze (at) dlr.deUNSPECIFIED
Hausmann, Joachimjoachim.hausmann (at) dlr.deUNSPECIFIED
Date:April 2014
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Adhesion, adherend, surface pre-treatment, pulsed laser, ageing, titanium grade 9, TiAl3V2.5, thermoplastic polymer, polyetheretherketone (PEEK)
Event Title:Euro Hybrid Materials and Structures 2014
Event Location:Stade
Event Type:international Conference
Event Dates:10.-11. April 2014
Organizer:DGM
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:fixed-wing aircraft
DLR - Research area:Aeronautics
DLR - Program:L AR - Aircraft Research
DLR - Research theme (Project):L - Structures and Materials
Location: Köln-Porz
Institutes and Institutions:Institute of Materials Research > Metallic Structures and Hybrid Material Systems
Deposited By: Haubrich, Jan
Deposited On:11 Nov 2014 14:51
Last Modified:31 Jul 2019 19:48

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