Research Article
Weldability Investigation and Optimization of Process Variables for TIG-Welded Aluminium Alloy (AA 8006)
Table 16
Analysis of variance for regression model (S/N ratio-hardness).
| | Source | DF | Seq SS | Contribution (%) | Adj SS | Adj MS | F-value | value |
| | Regression | 3 | 571.33 | 96.36 | 571.33 | 190.444 | 44.18 | 0.001 | | Peak current (Amps) | 1 | 66.67 | 11.24 | 66.67 | 66.667 | 15.46 | 0.011 | | Base current (Amps) | 1 | 450.67 | 76.01 | 450.67 | 450.667 | 104.54 | ≤0.001 | | Welding speed (mm/min) | 1 | 54.00 | 9.11 | 54.00 | 54.000 | 12.53 | 0.017 | | Error | 5 | 21.56 | 3.64 | 21.56 | 4.311 | | | | Total | 8 | 592.89 | 100.00 | | | | |
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