On the Mode I Fracture Toughness of Metal-Composite Joints with untreated SLM 3D-Printed Ti6Al4V Substrates

Michele Gulino, Rosemere de Araujo Alves Lima, Fabrizio Moroni, Alessandro Pirondi, Sofia Teixeira De Freitas

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

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Abstract

Here we investigate the adhesive properties of Selective Laser Melted (SLM) titanium surfaces in metal-composite cobonded joints without any prior surface treatment, to explore the inherent surface roughness of SLM parts to potentially create strong adhesive bonds. Double Cantilever Beam (DCB) tests were carried out to assess the joints mode I fracture toughness involving untreated SLM titanium and woven Carbon Fibre Reinforced Polymer (CFRP) adherends, co-bonded with an epoxy film adhesive. The same type of DCB joints, but now with sandblasted SLM titanium adherends, were tested to compare the adhesion strength of the untreated SLM surface versus the sandblasted surface. The findings reveal that joints with untreated SLM titanium adherends exhibit similar toughness to those with sandblasted SLM titanium adherends, indicating that the surface morphology of as-printed SLM titanium is suitable for manufacturing robust adhesive joints. The elimination of the surface treatment in the manufacturing of adhesive joints with SLM adherends could increase the interest of many industrial fields towards the use of adhesive bonding over other joining techniques.
Original languageEnglish
Title of host publicationProceedings of the 21st European Conference on Composite Materials
Subtitle of host publicationVolume 3 - Material and Structural Behavior – Simulation & Testing
EditorsChristophe Binetury, Frédéric Jacquemin
Place of PublicationFrance
PublisherThe European Society for Composite Materials (ESCM) and the Ecole Centrale de Nantes.
Pages1469-1476
Number of pages8
Volume3
ISBN (Electronic)978-2-912985-01-9
Publication statusPublished - 2024
Event21st European Conference on Composite Materials - Cité des Congrès de Nantes, Nantes, France
Duration: 2 Jul 20245 Jul 2024
Conference number: 21
https://eccm21.org/

Conference

Conference21st European Conference on Composite Materials
Abbreviated titleECCM21
Country/TerritoryFrance
CityNantes
Period2/07/245/07/24
Internet address

Keywords

  • Fracture toughness
  • Ti6Al4V
  • Carbon Fibre Reinforced Polymer (CFRP)
  • Selective Laser Melting (SLM)
  • Co-bonding

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