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  4. On the feasibility of a friction-based staking joining method for polymer-metal hybrid structures
 
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On the feasibility of a friction-based staking joining method for polymer-metal hybrid structures

Publikationstyp
Journal Article
Date Issued
2016-02-15
Sprache
English
Author(s)
Bastos Abibe, André  
Sônego, Marília  
dos Santos, Jorge F.  
Canto, Leonardo Bresciani  
Amancio, Sergio  
Institut
Kunststoffe und Verbundwerkstoffe M-11  
TORE-URI
http://hdl.handle.net/11420/5937
Journal
Materials and design  
Volume
92
Start Page
632
End Page
642
Citation
Materials and Design (92): 632-642 (2016-02-15)
Publisher DOI
10.1016/j.matdes.2015.12.087
Scopus ID
2-s2.0-84954539955
The increased use of hybrid structures to reduce weight currently faces the limitations of traditional joining methods. Consequently there is a niche for development of new joining techniques, which can reduce or overcome some of the existing limitations. This paper presents for the first time the new Friction-based Injection Clinching Joining technique (F-ICJ), describing the microstructure and changes in local properties of joints between polyetherimide (PEI) and aluminum alloy 6082-T6. A shear layer around the rotating tool composes a polymer thermomechanically affected zone (PTMAZ), which presents pores as a result of evolution of gaseous products. The PTMAZ shows decreases of 8% to 12% in local strength compared to the base material, as measured by microhardness. Ultimate forces of 1419 ± 43 N in lap shear and 430 ± 44 N in cross tensile were achieved for F-ICJ joints. These levels are similar to ultrasonic staking joints of the same material combination, but the hollow design of F-ICJ stakes accounts for improved strength-to-weight ratio (18% in lap shear, 21% in cross tensile). Although the F-ICJ process currently requires longer cycles (7.5 s) than state-of-the-art ultrasonic staking (2.8-2.9 s), generated results indicate that the F-ICJ process is a competitive staking joining method with potential for improvement.
Subjects
Friction joining
Hybrid joining
Polyetherimide
Polymer-metal structures
Processing technologies
Staking
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