Effects of interlayer on the friction stir spot welding of stainless steel. (2022)

• Record Type: Journal Article
• Authors: Raza, Muhammad Farhan; Yapici, Guney Guven
• Is Part Of: Materials today. Volume 62:Part 6(2022)
• Page Start: 4291
• Page End: 4294
• Publication Date: 2022
• Subjects: Friction stir spot welding -- Stainless steel -- Keyhole -- Interlayer -- Joint -- Lap shear strength; Materials science -- Congresses -- Periodicals; 620.1
• DOI: 10.1016/j.matpr.2022.04.797
• Languages: English
• ISSNs: 2214-7853

Abstract

Abstract: Comparison of Interlayer Friction Stir Spot Welding (IL-FSSW) and conventional Friction Stir Spot Welding (FSSW) of 304 stainless steel is presented in this study. IL-FSSW is introduced as a novel spot-welding technique to avoid the keyhole formation at the weld spot. This process is employed to fabricate a joint between two stainless steel sheets. The utilization of an interlayer material prevents the occurrence of keyhole without any additional post-process treatment. In addition, the interlayer material also enhances ductility and provides a joint with a maximum lap shear load of 7 kN. The micrographs of the weld zone cross-section were recorded and it was observed that the interlayer material played a significant role in the development of the nugget zone by supporting the formation of a hook structure.