Microstructural Characteristics and Mechanical Properties of Friction Stir Spot Welded 2A12-T4 Aluminum Alloy

Figure 11

(a) Upper side of the upper sheet, (b) lower side of the upper sheet, (c) upper side of the lower sheet and (d) cross-section of the shear fracture specimen.

(a)

(b)

(c)

(d)