Table 6 The quadratic coefficients of response surface for the objective functions of threaded cylindrical pin.
Obj.\coefficient | Sy | Impact toughness | Failure strain | HAZ adv | HAZ ret |
|---|---|---|---|---|---|
A | 42.20 | 1.97 | 41.20 | 0.76 | 0.77 |
B | 24.70 | − 0.13 | − 40.60 | 11.80 | 10.50 |
C | 0.831 | 0.019 | − 0.880 | 0.456 | 0.493 |
D | − 0.258 | 0.002 | 0.444 | 0.070 | 0.036 |
E | 116.0 | − 1.5 | − 146.0 | − 10.8 | 10.5 |
G | − 4.09 | − 0.20 | − 4.44 | − 0.09 | − 0.10 |
H | − 0.79 | 0.00 | 1.28 | − 0.34 | − 0.30 |
I | − 7.44e−03 | − 1.70e−04 | 6.75e−03 | − 4.15e−03 | − 4.59e−03 |
J | 1.44e−04 | − 1.71e−06 | − 2.73e−04 | − 6.05e−05 | − 3.95e−05 |
K | − 16.50 | 0.24 | 24.80 | 1.95 | − 1.81 |
L | − 383.0 | − 2.5 | 293.0 | − 96.4 | − 102.0 |
