Fig. 5

Macrographs of the top surface of the FSWed joints: (a) Eccentric shoulder, 0 tilt angle, (b) Aligned shoulder, 0 tilt angle, (c) Eccentric shoulder, 3o tilt angle, (d) Aligned shoulder, 3o tilt angle.

Macrographs of the top surface of the FSWed joints: (a) Eccentric shoulder, 0 tilt angle, (b) Aligned shoulder, 0 tilt angle, (c) Eccentric shoulder, 3o tilt angle, (d) Aligned shoulder, 3o tilt angle.