Fracture Behavior of Ion-Nitrided AISI 4140 Steel in accordance with Variable Applied Current Density

Figure 5

Micrographs of the Vickers indentation and cracks at test loads of 490 N. (a) Untreated. (b) Sample A. (c) Sample B. (d) Sample C.

(a)

(b)

(c)

(d)