Abstract
A novel joining technology was applied to join Fiber Reinforced Polymer (FRP) and AZ31B Mg alloy, which combined the laser-arc welding source and riveting joining methods. The design idea of the stepped rivet was proposed. The weld morphology, mechanical properties, microstructures of welds under two different rivet structures were investigated. FRP and AZ31B Mg could be joined successfully by the new hybrid joining method when it used two different structural rivets. The maximum tensile shear load of the joint under stepped rivet of small size was only 800 N, while that of the joint under stepped rivet of the larger size could reach 1419 N, nearly 90% of that of FRP. There was no reaction between the FRP plate and AZ31B rivet. While the magnesium elements and aluminum elements diffused and reacted with other elements in the FRP plate/AZ31B plate interface.
Highlights
Due to environmental pollution and resources shortage, reducing energy consumption and carbon emissions has become the future development goals of manufacturing industries
Light alloys, such as magnesium, aluminum, titanium, are the most frequently used in automotive lightweighting
The research on Fiber Reinforced Polymer (FRP) composites has become a popular topic for lightweight materials due to their advantages of wear resistance, corrosion resistance, high strength, low density, and so on [12,13]
Summary
Due to environmental pollution and resources shortage, reducing energy consumption and carbon emissions has become the future development goals of manufacturing industries. Having a lightweight automobile is one of the most effective means of reducing carbon dioxide emissions and fuel consumption, and in automotive lightweight technology, the use of lightweight materials is the focus of research [2,3] Light alloys, such as magnesium, aluminum, titanium, are the most frequently used in automotive lightweighting. L. Blaga et al [26] proved and investigated the feasibility of FricRiveting on PEI-GF/Titanium/Aluminum connections, and lap shear strengths of the welds were up to about 200 MPa. And we used the welding and riveting hybrid bonding method to join the Al alloy and polyether-ether-ketone (PEEK) PEEK composites successfully, and the interface structure between the Al alloy and the composite is the key factor for the property [27]. The elements distribution and reaction phase on the interface are analyzed by EPMA and XPS, to understand the joining mechanism between the FRP and Mg alloy
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