Research Article
Optimization of Deformation Behaviors during Continuous Forming Extrusion of C18150 Copper Alloy through Response Surface Methodology
Table 8
Estimated regression coefficients for effective stress (test of significance for extrusion effective stress for C18150).
| Term | Coef | SE coef | T | |
| Constant | 11621.2 | 105.795 | 109.847 | 0.000 | x1 | −67.2 | 1.568 | −42.886 | 0.000 | x2 | 0.6 | 0.068 | 8.818 | 0.000 | x3 | −1.4 | 0.066 | −20.474 | 0.000 | x4 | −21486.7 | 202.635 | −106.036 | 0.000 | | 1.7 | 0.017 | 99.108 | 0.000 | | −0.0 | 0.000 | −64.695 | 0.000 | | −0.0 | 0.000 | −43.589 | 0.000 | | 8400.0 | 108.972 | 77.084 | 0.000 | | −0.0 | 0.001 | −0.795 | 0.442 | | −0.1 | 0.001 | −161.328 | 0.000 | | 112.5 | 1.573 | 71.525 | 0.000 | | −0.0 | 0.000 | −95.366 | 0.000 | | 3.5 | 0.063 | 55.630 | 0.000 | | 6.0 | 0.063 | 95.366 | 0.000 |
|
|