Effect of Feed Rate in FSW on the Mechanical and Microstructural Properties of AA5754 Joints

Figure 11

Orientation imaging grain boundary maps (left column), their corresponding histogram for the misorientation angle distribution (middle column), and subgrain size distributions (right column) for friction stir welded joints welded at 1070 rpm and different feed rates: (a) 36 mm/min; (b) 70 mm/min; (c) 140 mm/min. Average misorientation angle: (a) 26°; LAGB: 31%; HAGB: 69%; (b) 24°; LAGB: 44%; HAGB: 56%; (c) 21°; LAGB: 48%; HAGB: 52%.