Dissimilar Joint Welding Through Friction Stir Techniques: Mechanical and Microstructural Properties of AA2198-T8 & AA2024-T3

Abstract

Friction stir welding is used to evaluate the metallurgical and material characteristics of AA2198-T8 and AA2024-T3 welds. One of the most often utilised high-strength aluminium alloys in the aerospace industry is AA2024-Tx. The latest generation of aluminium lithium alloys, AA2198-T8, just replaced AA2024-T3. Yet, sound weld methods with the highest mechanical qualities have yet to be adequately characterised. These two materials were selected and joined through two techniques. The first is a single side friction stir weld, while the second is a double side friction stir weld. This technique was used to create specimens by holding them side by side. After the stirring, the hybrid joint was created by taking spindle speeds of 580 RPM and travel speeds of 36, 76, 102, 146, and 216 mm/min into account. The tool angle and dwell duration evaluated in this study were 2o and 20 seconds, respectively. Fabricated samples were then sectioned in accordance with industry standards. Tests to determine factors like as tensile strength, impact load, and microstructures at various temperature zones. The results show that the maximum joint efficiency for a double-side friction stir welded connection at 102 mm/min was 96%.