Microstructural and Mechanical Behaviors of Friction Stir Welded Dissimilar AA6082-AA7075 Joints

Table 8

Macrostructures of weld joints cross sections.

Sample no.	Macrographs of the cross section of weld joints	Weld joint quality
6		Good (defect-free weldment)
5		Good (defect-free weldment)
1		Acceptable weld joint inadequate material mixing on the retreating side
8		Acceptable weld joint with tunnel defect on joint line at the bottom
3		Poor weld joint with tunnel defect on the retreating side
2		Poor weld joint with tunnel defect on the retreating side