Izboljšanje mehanske zmogljivosti zvarnih spojev za podvodne aplikacije ter izboljšanje lastnosti intermetalne plasti zvarov na osnovi Al zlitine AA5083 in Cu
Year: 2026
Type: article
Abstract: This research investigates the underwater friction stir welding (UWFSW) of dissimilar AA5083 aluminum and pure-copper plates, aiming to enhance the mechanical performance through precise control of the process parameters and the suppression of excessive intermetallic compound (IMC) formation. The UWFSW was performed using a CNC vertical milling machine under full immersion to regulate the heat input and improve the joint’s integrity. The optimized parameters yielded a maximum tensile strength of 7.5 MPa, impact strength of 7.5 J, and peak microhardness of 111 VH, outperforming conventional dry FSW joints. Optical microscopy and SEM analyses revealed a defect-free joint with a fine equiaxed grain structure in the stir zone, minimal deformation in the parent zones, and a uniform IMC layer of 2–5-µm thickness along the Al–Cu interface. The underwater cooling effect restricted grain coarsening and prevented void formation, resulting in enhanced metallurgical bonding. The study confirms that UWFSW offers a superior route to producing high-strength, corrosion-resistant Al–Cu dissimilar joints, making it highly suitable for marine, cryogenic, and high-performance electrical applications.
Institution: SRM Institute of Science and Technology
Language: English
Subfield: Mechanical Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7134104583
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