Abstract:Friction stir welding (FSW) has been widely applied and studied intensively in recent times. The majority of FSW studies have been based on butt joint configuration. Joining with lap configuration is also widely used in rail, automotive and aerospace industries. Thus, various FS material flow related joint features and deformation and fracture behaviours of the joints under loading need to be better understood for FSLW to be more widely applied particularly for light weight structure applications. In this pape… Show more
“…The upward flow induced by rotating pin together with shoulder forging sideward shapes the final orientation of a hook (Figure 5(d)). The intensities of these opposite material flow determine the size and orientation of a hook [22]. As shown in Figure 5(c), the onion ring structure, which is a characteristic material transport phenomena in the NZ during FSW, can be seen in both samples B and C. Figure 5 Cross-sections and material flow patterns of; (a) sample B, (b) sample C, (c) hook formed in the AS of sample B, and (d) the onion ring structure in the NZ of sample B.…”
In this study, orbital friction stir lap welding of 360 mm diameter AA5083-H321 tube to 350 mm diameter AA5083-O flange was investigated. The influence of rotational and travel speed of tool with triangular frustum pin on the metallurgical structure and mechanical properties of orbital friction stir lap welded samples were studied. The results indicated that defect free orbital lap joints are successfully obtained using tool rotational speed of 650 and 800 rev min −1 with a constant travel speed of 40 mm min −1 . The strengthening mechanism in the stir zone is solid solution strengthening and dislocation looping. The maximum joint strength was achieved at a welding speed of 650 rev min −1 and 40 mm min −1 . Failure of tensile shear test samples occurred far from the friction stir welding zone.
“…The upward flow induced by rotating pin together with shoulder forging sideward shapes the final orientation of a hook (Figure 5(d)). The intensities of these opposite material flow determine the size and orientation of a hook [22]. As shown in Figure 5(c), the onion ring structure, which is a characteristic material transport phenomena in the NZ during FSW, can be seen in both samples B and C. Figure 5 Cross-sections and material flow patterns of; (a) sample B, (b) sample C, (c) hook formed in the AS of sample B, and (d) the onion ring structure in the NZ of sample B.…”
In this study, orbital friction stir lap welding of 360 mm diameter AA5083-H321 tube to 350 mm diameter AA5083-O flange was investigated. The influence of rotational and travel speed of tool with triangular frustum pin on the metallurgical structure and mechanical properties of orbital friction stir lap welded samples were studied. The results indicated that defect free orbital lap joints are successfully obtained using tool rotational speed of 650 and 800 rev min −1 with a constant travel speed of 40 mm min −1 . The strengthening mechanism in the stir zone is solid solution strengthening and dislocation looping. The maximum joint strength was achieved at a welding speed of 650 rev min −1 and 40 mm min −1 . Failure of tensile shear test samples occurred far from the friction stir welding zone.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
