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Abstract
The current paper investigates the durability of the single-lap shear aluminum-composite friction spot joints and their behavior under harsh accelerated aging as well as natural weathering conditions. Four aluminum surface pre-treatments were selected to be performed on the joints based on previous investigations; these were sandblasting (SB), conversion coating (CC), phosphoric acid anodizing (PAA), and PAA with a subsequent application of primer (PAA-P). Most of the pre-treated specimens retained approximately 90% of their initial as-joined strength after accelerated aging experiments. In the case of the PAA pre-treatment, the joint showed a lower retained strength of about 60%. This was explained based on the penetration of humidity into the fine pores of the PAApre-treated aluminum, reducing the adhesion between the aluminum and composite. Moreover, friction spot joints produced with three selected surface pre-treatments were held under outside natural weathering conditions for one year. PAA-P surface pre-treated specimens demonstrated the best performance with a retained strength of more than 80% after one year. It is believed that tight adhesion and chemical bonding reduced the penetration of humidity at the interface between the joining parts.
Original language | English |
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Article number | 1144 |
Number of pages | 20 |
Journal | Materials |
Volume | 13 |
Issue number | 5 |
DOIs | |
Publication status | Published - 4 Mar 2020 |
Keywords
- Friction spot joining
- fiber reinforced composites
- aluminum alloys
- aging
- outdoor environmental durability
- mechanical properties
- Aging
- Fiber reinforced composites
- Mechanical properties
- Aluminum alloys
- Outdoor environmental durability
ASJC Scopus subject areas
- Materials Science(all)
Fields of Expertise
- Advanced Materials Science
Projects
- 1 Finished