Table 10.
Correlation analysis of micro-channels’ attributes with electric discharge machining parameters.
| Response | p-Value | Significance | Coefficient | Relationship | |
|---|---|---|---|---|---|
| Strength | Direction | ||||
| Correlation of micro-channels’ features with pulse on-time (T-on) | |||||
| IFT | 0.000 | Significant | −0.639 | Moderately strong | -ve |
| IFR | 0.001 | - | 0.596 | Moderately strong | +ve |
| IFH | 0.000 | - | −0.866 | Strong | -ve |
| MCW | 0.000 | - | 0.847 | Strong | +ve |
| Correlation of micro-channels’ features with pulse off-time (T-off) | |||||
| IFT | 0.414 | Insignificant | −0.164 | Very weak | -ve |
| IFR | 0.147 | - | −0.287 | Weak | -ve |
| IFH | 0.976 | - | −0.006 | Zero | NA |
| MCW | 0.492 | - | 0.138 | Very weak | +ve |
| Correlation of micro-channels’ features with servo voltage (SV) | |||||
| IFT | 0.950 | - | 0.013 | Zero | NA |
| IFR | 0.439 | - | −0.155 | Very weak | -ve |
| IFH | 0.751 | - | −0.064 | Zero | NA |
| MCW | 0.868 | - | −0.033 | - | - |
| Correlation of micro-channels’ features with wire tension (WT) | |||||
| IFT | 0.628 | - | 0.098 | Zero | NA |
| IFR | 0.771 | - | 0.059 | - | - |
| IFH | 0.522 | - | 0.129 | Very weak | +ve |
| MCW | 0.559 | - | −0.118 | - | -ve |
| Correlation of micro-channels’ features with wire feed rate (WF) | |||||
| IFT | 0.689 | - | −0.081 | Zero | NA |
| IFR | 0.569 | - | 0.155 | Very weak | +ve |
| IFH | 0.731 | - | 0.069 | Zero | NA |
| MCW | 0.938 | - | 0.016 | - | - |