Wear Performance of Bionic Dimpled-Shape Pistons of Mud Pump

Figure 6

Wear patterns of pistons with different dimple central included angles under the same area density: (a) L-S1 piston and (b) L-S2 piston. (a′, b′) were partial enlarged pictures of (a, b).

(a)

(a′)

(b)

(b′)