Biomedical
Multi-Response Optimization of Process Parameters in Friction Stir Welding of AA 8011-H14 / AA 5052-H34 using Taguchi Grey Relational Analysis
Sendhil Kumar Natarajan,
Gopi Vasudevan
Peer Reviewed
Abstract
Friction stir welding (FSW) offers a distinct advantage in its ability to effectively join dissimilar metals and alloys. This study focuses on the butt welding of AA 8011-H14 and AA5052-H34 through FSW, aiming to explore the influence of process parameters on crucial mechanical properties such as ultimate tensile strength, yield strength, percentage elongation, and hardness. The examination of the welded cross-section revealed variations in both grain orientation and size across different zones. Notably, most failures were identified at the base of AA8011-H14 on the Advancing side. Furthermore, the hardness of the nugget zone exhibited variability based on the material ratio mix, with the maximum hardness observed on the AA5052-H34 side. Comparisons of optimal joint efficiencies were made to assess the overall effectiveness of the welded joints. This investigation contributes valuable insights into the intricacies of FSW when applied to dissimilar metal combinations, shedding light on the impact of process parameters on the mechanical characteristics of the joints.
Key Questions and Answers
1. What is the main focus of this study?
The study investigates the effect of process parameters on mechanical properties such as tensile strength, yield strength, elongation, and hardness in the FSW of AA 8011-H14 and AA 5052-H34 alloys.
2. What was observed in the welded cross-section?
Variations in grain orientation and size were observed across different zones, with failures commonly occurring at the base of AA 8011-H14 on the Advancing side.
3. How did hardness vary across the joint?
Hardness showed variability depending on the material ratio, with the highest hardness observed on the AA 5052-H34 side of the nugget zone.
4. What was the outcome of the joint efficiency comparison?
Optimal joint efficiencies were compared, which helped assess the overall effectiveness of the welded joints.
