Table 5.
ANOVA results for surface roughness.
| Cutting Parameters | Degree of Freedom | Sum of Squares | Mean Square | F Value | p-Value | Percent Contribution (%) |
|---|---|---|---|---|---|---|
| Surface Roughness Ra (µm) | ||||||
| Cutting Speed | 1 | 0.5053 | 0.15356 | 5.28 | 0.034 | 5 |
| Feed Rate | 1 | 7.1810 | 7.28679 | 250.73 | 0.000 | 69.4 |
| Cutting Edge Angle | 1 | 0.2178 | 0.30487 | 10.49 | 0.005 | 2.1 |
| Cutting Speed × Cutting Speed | 1 | 1.3636 | 1.36355 | 46.92 | 0.000 | 13.2 |
| Feed Rate × Feed Rate | 1 | 0.3520 | 0.35203 | 12.11 | 0.003 | 3 |
| Cut. Ed. Ang. × Cut. Ed. Ang. | 1 | 0.0015 | 0.00145 | 0.05 | 0.826 | 0.01 |
| Cutting Speed × Feed Rate | 1 | 0.0006 | 0.00061 | 0.02 | 0.886 | 0.01 |
| Cutting Speed × Cut. Ed. Ang. | 1 | 0.2089 | 0.20886 | 7.19 | 0.016 | 2 |
| Feed Rate × Cut. Ed. Ang. | 1 | 0.0190 | 0.1903 | 0.65 | 0.430 | 0.1 |
| Error | 17 | 0.4941 | 0.02906 | 5 | ||
| Total | 26 | 10.3437 | 100 |