Research Article
Multiobjective Optimization for Forming Process Parameters of Ultrahigh Strength Steel BR1500HS
Table 7
Analysis of variance (ANOVA) for the elongation.
| | Source | Sum of squares | Free degree | Mean square | F value | value |
| | Model | 19.35609 | 5 | 3.871218 | 12.02011 | 0.0025 | | T | 0.004033 | 1 | 0.004033 | 0.012523 | 0.9140 | | t | 0.986133 | 1 | 0.986133 | 3.061937 | 0.1236 | | T×t | 0.1089 | 1 | 0.1089 | 0.338134 | 0.5791 | | T2 | 17.99722 | 1 | 17.99722 | 55.88125 | 0.0001 | | t2 | 2.867384 | 1 | 2.867384 | 8.903207 | 0.0204 | | Residual | 2.254433 | 7 | 0.322062 | — | — | | Lack of fit | 2.254433 | 3 | 0.751478 | — | — | | Pure error | 0 | 4 | 0 | — | — | | Cor total | 21.61052 | 12 | — | — | — | | R2 = 0.8957 | = 0.8212 | Pred R2 = 0.0191 | Adeq precision = 9.290 |
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