Table 6 ANOVA table for kerf taper.

From: Surface integrity and kerf quality improvement in laser beam machining of Nimonic C-263 by hybrid TOPSIS–grasshopper optimization approach

Source

Sum of squares

df

Mean square

F-value

p value

Percentage contribution

 

Model

24.93

10

2.49

13.19

< 0.0001

88.00

Significant

A-laser power

9.69

1

9.69

51.28

< 0.0001

34.20

 

B-cutting speed

1.40

1

1.40

7.42

0.0139

4.94

 

C-gas pressure

0.1941

1

0.1941

1.03

0.3244

0.69

 

D-focal position

0.2457

1

0.2457

1.30

0.2692

0.87

 

AB

3.38

1

3.38

17.87

0.0005

11.93

 

AC

1.82

1

1.82

9.65

0.0061

6.42

 

AD

1.88

1

1.88

9.92

0.0055

6.64

 

BC

2.29

1

2.29

12.12

0.0027

8.08

 

A2

3.00

1

3.00

15.89

0.0009

10.59

 

C2

1.53

1

1.53

8.11

0.0107

5.40

 

Residual

3.40

18

0.1891

    

Lack of fit

2.89

14

0.2064

1.61

0.3458

 

Not significant

Pure error

0.5137

4

0.1284

    

Cor total

28.33

28

     
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