Surface Layer Properties after Successive EDM or EDA and Then Superficial Roto-Peen Machining

Figure 12

(a) Microhardness versus the distance from the edge for the specimen machined by the tungsten electrode at the following parameters. (a) EDA I = 24 (A), Ti = 400 (μs), (b) EDA I = 24 (A). Ti = 400 (μs) and then the roto-peen 𝑛=4100 (rev/min), 𝑡=75 (s).

(a)

(b)