Optimization of Fusion Zone Grain Size, Hardness, and Ultimate Tensile Strength of Pulsed Current Microplasma Arc Welded AISI 304L Sheets Using Genetic Algorithm
Table 5
ANOVA table.
Source
DF
Seq SS
Adj SS
Adj MS
Grain size
Regression
14
249.023
249.023
17.7873
6.10
0.000
Linear
4
65.207
65.207
16.3018
5.59
0.005
Square
4
91.443
91.443
22.8608
7.84
0.001
Interaction
6
92.372
92.372
15.3954
5.28
0.004
Residual error
16
46.639
46.639
2.9149
Lack of fit
10
9.750
9.750
0.9750
0.16
0.994
Pure error
6
36.889
36.889
6.1481
Total
30
295.661
Hardness
Regression
14
228.18
228.18
16.299
5.67
0.001
Linear
4
61.17
61.17
15.292
5.32
0.006
Square
4
83.64
83.64
20.910
7.27
0.002
Interaction
6
83.38
83.38
13.896
4.83
0.005
Residual error
16
46.01
46.01
2.876
Lack of fit
10
10.58
10.58
1.058
0.18
0.991
Pure Error
6
35.43
35.43
5.905
Total
30
274.19
Ultimate tensile strength
Regression
14
676.218
676.218
48.3013
6.87
0.000
Linear
4
205.667
205.667
51.4167
7.31
0.002
Square
4
210.551
210.551
52.6379
7.48
0.001
Interaction
6
260.000
260.000
43.3333
6.16
0.002
Residual error
16
112.524
112.524
7.0327
Lack of fit
10
1.667
1.667
0.1667
0.01
1.000
Pure error
6
110.857
110.857
18.4762
Total
30
788.742
DF: degrees of freedom, SS: sum of squares, MS: mean squares, and : Fishers ratio.
