Abstract
AbstractIn this study, similar aluminum alloys AA5052 with additional carbon fiber-reinforced polymer composite (CFRP) interlayer were selected to investigate the effect of welding parameters (rotational speed and dwell time) on the mechanical properties, joint efficiency, and microstructure of friction stir spot weld joint. The maximum tensile shear load was 1779.6 N with joint efficiency of 14.6% obtained at rotational speed of 2,000 rpm and 2 s dwell time, which is 39.5% higher than the value at low rotational speed 850 rpm and 2 s dwell time. Meanwhile, the maximum microhardness 58 HV was attained in the keyhole region at rotational speed of 2,000 rpm and dwell time of 5 s, which is 22.4% higher compared to low rotational speed. The SEM-EDS results reveal the presence of intermetallic compounds (Al–Mg–C), which enhance the intermetallic bonding between elements.
Highlights
In this study, similar aluminum alloys AA5052 with additional carbon fiber-reinforced polymer composite (CFRP) interlayer were selected to investigate the effect of welding parameters on the mechanical properties, joint efficiency, and microstructure of friction stir spot weld joint
The objective of this study is to evaluate the effect of CFRP interlayer on the performance of mechanical properties and microstructural properties (SEM-EDS) and joint efficiency of the weld joints
The current study demonstrated that similar aluminum alloys 5052 with additional CFRP interlayer were successfully joined by applying friction stir spot welding
Summary
Abstract: In this study, similar aluminum alloys AA5052 with additional carbon fiber-reinforced polymer composite (CFRP) interlayer were selected to investigate the effect of welding parameters (rotational speed and dwell time) on the mechanical properties, joint efficiency, and microstructure of friction stir spot weld joint. Applications of lightweight materials such as aluminum, magnesium, and metal foams, as typical porous materials [2], have been increased in automotive and aerospace industries [3]. Nanocomposite and composite materials have attracted great attention because of their exclusive improving and properties’ effects on specific mechanical performance which are not easy to achieve with other materials [11]. Despite the fact that the extraordinary mechanical characteristics of CFRPs make them an attractive option for designers, they have to outperform existing lightweight structural automotive materials [13], whereas carbon nanotubes are suitable for electrical and thermal application [14]. Reinforcing core layer with CNTs leads to remarkable drop and increase in thermal and mechanical buckling resistances, This work is licensed under the Creative Commons Attribution 4.0
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