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Additive Manufacturing of Titanium with Different Surface Structures for Adhesive Bonding and Thermal Direct Joining with Fiber-Reinforced Polyether-Ether-Ketone (PEEK) for Lightweight Design Applications
Institute of Materials Science (IfWW), Technische Universität Dresden, Helmholtzstr. 7, 01069 Dresden, Germany. Fraunhofer Institute for Material and Beam Technology IWS, Winterbergstraße 28, 01277 Dresden, Germany.
Fraunhofer Institute for Material and Beam Technology IWS, Winterbergstraße 28, 01277 Dresden, Germany.
Fraunhofer Institute for Material and Beam Technology IWS, Winterbergstraße 28, 01277 Dresden, Germany.
Fraunhofer Institute for Material and Beam Technology IWS, Winterbergstraße 28, 01277 Dresden, Germany.
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2021 (English)In: Metals, ISSN 2075-4701, Vol. 11, no 2, article id 265Article in journal (Refereed) Published
Abstract [en]

Hybrid joints consisting of metals and fiber-reinforced polymer composites exhibit highly desirable properties for many lightweight design applications. This study investigates the potential of additively manufactured surface structures for enhancing the bond strength of such joints in comparison to face milled and laser structured surfaces. Titanium samples with different surface structures (as-built surface, groove-, and pin-shaped structures) were manufactured via electron beam melting and joined to carbon fiber-reinforced polyether-ether-ketone (PEEK) via adhesive bonding and thermal direct joining, respectively. Bond strength was evaluated by tensile shear testing. Samples were exposed to salt spray testing for 1000 h for studying bond stability under harsh environmental conditions. The initial tensile shear strengths of the additively manufactured samples were competitive to or in some cases even exceeded the values achieved with laser surface structuring for both investigated joining methods. The most promising results were found for pin-shaped surface structures. However, the hybrid joints with additively manufactured structures tended to be more susceptible to degradation during salt spray exposure. It is concluded that additively manufactured structures can be a viable alternative to laser surface structuring for both adhesive bonding and thermal direct joining of metal-polymer hybrid joints, thus opening up new potentials in lightweight design.

Place, publisher, year, edition, pages
MDPI, 2021. Vol. 11, no 2, article id 265
Keywords [en]
metal-polymer hybrid joints, thermal direct joining, adhesive bonding, additive manufacturing, titanium, carbon fiber-reinforced PEEK, laser surface structuring, salt spray testing
National Category
Manufacturing, Surface and Joining Technology
Research subject
Manufacturing Systems Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-82839DOI: 10.3390/met11020265ISI: 000622780000001Scopus ID: 2-s2.0-85100308645OAI: oai:DiVA.org:ltu-82839DiVA, id: diva2:1527018
Note

Validerad;2021;Nivå 2;2021-02-09 (alebob)

Available from: 2021-02-09 Created: 2021-02-09 Last updated: 2021-03-25Bibliographically approved

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Brückner, Frank

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