Microstructure and Conductivity of the Al-Cu Joint Processed by Friction Stir Welding

Figure 7

The fractured fracture morphology of the joints produced by (a) 750 rpm-0°, (b) 950 rpm-0°, (c) 1180 rpm-0°, (d) 1500 rpm-0°, (e) 950 rpm-2°, and (f) 1180 rpm-2°.

(a)

(b)

(c)

(d)

(e)

(f)