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  4. Influence of the interlayer film thickness on the mechanical performance of AA2024-T3/CF-PPS hybrid joints produced by friction spot joining
 
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Influence of the interlayer film thickness on the mechanical performance of AA2024-T3/CF-PPS hybrid joints produced by friction spot joining

Publikationstyp
Journal Article
Date Issued
2018-01-02
Sprache
English
Author(s)
Manente André, Natália  
Goushegir, Seyed Mohammad  
Santos, Jorge F. dos  
Canto, Leonardo Bresciani  
Amancio, Sergio  
Institut
Kunststoffe und Verbundwerkstoffe M-11  
TORE-URI
http://hdl.handle.net/11420/3194
Journal
Welding international  
Volume
32
Issue
1
Start Page
1
End Page
10
Citation
Welding International 1 (32): 1-10 (2018-01-02)
Publisher DOI
10.1080/09507116.2017.1347319
Scopus ID
2-s2.0-85031400856
Friction Spot Joining (FSpJ) is an innovative friction-based joining technique for metal-polymer hybrid structures. Friction spot joints of aluminium alloy 2024-T3 and carbon fibre-reinforced poly(phenylene sulphide) composite laminate (CF-PPS) were produced with an additional PPS film interlayer. Two different film thicknesses were investigated in this study: 100 and 500 μm. Lap shear testing demonstrated that the joints produced with 100-μm film (2093 ± 180 N) were stronger than the joints with 500 μm (708 ± 69 N). Additionally, the fracture surface analysis revealed a larger bonding area for the joints with 100-μm film (53 ± 2 mm2) as compared to the joints with 500-μm film (40 ± 1 mm2). Considering the low thermal conductivity of PPS, the thinnest film is more likely to soften by the frictional heat during the joining process. Hence, the low viscosity of the molten PPS favours the wettability of the parts’ surfaces. Microstructural analyses proved that the metallic nub formation and the interdiffusion of PPS chains between film and composite matrix are also favoured for thinner film use. Thus, superior adhesion between the partners is achieved. Therefore, it was concluded that the addition of the thinnest film interlayer leads to stronger joints.
More Funding Information
The authors thank the Helmholtz Association of Germany for financial support (Young Investigator Group ‘Advanced Polymer-Metal Hybrid Structures’ (grant number VH-NG-626)), the FAPESP for the grant to do a master’s degree awarded to Natália M. André (Process 2014/09271–0) and the CNPq for the research productivity grant awarded to Leonardo B. Canto (Process 304169/2014–5).
This work was supported by Helmholtz Association of Germany (Young Investigator Group ‘Advanced Polymer-Metal Hybrid Structures’ [grant number VH-NG-626]); the FAPESP (Process 2014/09271-0) and the CNPq (Process 304169/2014-5).
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