Behavior and Relationships between Residual Stresses and Mechanical Properties in Welded Joints of Aluminum Alloy AA5083-H116 Using Pulsed Gas Metal Arc Welding

• Published in: Journal of materials engineering and performance 2024-04, Vol.33 (8), p.3912-3919
• Main Authors: Niebles-Nuñez, Enrique Esteban, Unfried-Silgado, Jimy, Torres-Salcedo, Jaime Elías, Ramírez, Antonio J.
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Corrosion and Coatings; Engineering Design; Materials Science; Original Research Article; Quality Control; Reliability; Safety and Risk; Tribology
• ISSN: 1059-9495; 1544-1024
• DOI: 10.1007/s11665-023-09082-y

This work discusses several aspects of the weldability of AA5083-H116 butt-welded joints, using ER5183 filler material, automated GMAW-P process, and 80Ar19He1O 2 shielding gas. The used methodology included the characterization of base metal, the development of welded joints using two different heat inputs, the microhardness profiles analysis on the cross section of the welded joint, and the microstructural evolution using microscopy. The above-mentioned measurements were complemented with residual stress evaluation using the x-ray diffraction technique, together with analysis of transversal and longitudinal tensile tests of the welded joints. The obtained results in welded joints indicated that yield strength, ultimate tensile strength, and ductility behavior have been influenced by heat input compared to base metal and reported values for similar alloys. Residual stress results showed that both the weld metal and adjacent coarse grain zone were subjected to tensile stresses, while the refined grain zone (FGZ) and base metal adjacent to the FGZ were subjected to compressive stresses. Additionally, the magnitude of residual stresses was smaller than maximum tensile stresses, and its behavior was related to both heat input and mechanical properties along welding regions.