Multifeature Extraction of Three-Dimensional Topography of Carbon Steel Specimen during Fatigue Process

Figure 8

The surface multifractal spectrum of the metal fatigue process. (a) Specimen no. 1. (b) Specimen no. 2. (c) Specimen no. 3. (d) Specimen no. 4.

(a)

(b)

(c)

(d)