Research Article
Effect of Equal Channel Angular Pressing on the Surface Roughness of Solid State Recycled Aluminum Alloy 6061 Chips
Table 2
The cutting parameters and their levels used in the Box-Behnken design.
| | Designation | Process parameter | Level 1 | Level 2 | Level 3 | Level 4 |
| | A | V | 100 | 150 | 200 | — | | B | d | 0.10 | 0.25 | 0.40 | — | | C | | 0.012 | 0.081 | 0.15 | — | | D | Specimen condition | No ECAP | One pass ECAP | Two passes ECAP | Three passes ECAP |
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