The study of friction stir welding Al alloy/carbon fiber reinforced polymer composites
Year: 2025
Type: conference-paper
Abstract: Friction stir welding (FSW) was carried out on two aluminum alloy sheets with an embedded carbon fiber-reinforced polymer (CFRP) layer using a pinless embedded rod tool. The process was performed under a downward force of 6 kN, a rotational speed of 600 rpm, and travel speeds of 15 and 30 mm/min. During welding, the temperature measured 2 mm below the center of the stir zone increased rapidly to approximately 500 °C. The welded joints exhibited a maximum failure load of 6200 N, corresponding to an increase of approximately 1.7 times compared to joints without CFRP embedding. Metallographic examination and scanning electron microscopy (SEM) were employed to investigate the weld zone and its microstructural characteristics. Two primary bonding mechanisms were identified: (1) adhesive bonding through solidified molten polymer at the aluminum interface, and (2) mechanical interlocking through the embedding of carbon fibers into the plastically deformed aluminum matrix. The latter mechanism played a critical role in enhancing joint strength by incorporating structural fibers into the metallic interface, thereby improving the overall integrity of the bonded assembly.
Institutions: National Taitung University, Kun Shan University
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4416577458