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Table 2 Experimental layout for the BBD

From: Optimal selection of operating parameters in end milling of Al-6061 work materials using multi-objective approach

Std Order

Feed(f)(mm/min)

Speed(s)(rpm)

Axial depth of cut(b)(mm)

Amplitude of vibration level(A)(mv)

Surface roughness (Ra) μm

1

20

1800

0.5

0.0640

0.800

2

60

1800

0.5

0.1430

0.333

3

20

3000

0.5

0.1128

2.200

4

60

3000

0.5

0.0944

0.333

5

20

2400

0.2

0.1780

2.860

6

60

2400

0.2

0.1980

0.530

7

20

2400

0.8

0.2220

0.800

8

60

2400

0.8

0.0730

0.330

9

40

1800

0.2

0.1462

0.200

10

40

3000

0.2

0.0834

1.130

11

40

1800

0.8

0.0634

0.200

12

40

3000

0.8

0.0896

1.730

13

40

2400

0.5

0.0752

1.200

14

40

2400

0.5

0.0752

1.200

15

40

2400

0.5

0.0720

1.200