Table 6 Statistical table of surface roughness before and after SPE for the wire-cut substrate samples.

From: Experimental investigation on the effect of solid particle erosion on the water droplet erosion damages for blade materials

Surface roughness before SPE/μm

Surface roughness after SPE/μm

Roughness relative variation

1.453

1.5825

8.9%

1.39

1.46

5.04%

1.448

1.4925

3.07%

Average variation: 5.67%

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