Table 3 Design of experiment for width-to-thickness (w/t) ratio of a discontinuous chip and its results.

From: Machinability and ANN based prediction of surface roughness for TiAlN and PCD coated end mill cutters on AA6061 hybrid composite

S. no.

Spindle speed (rpm)

Depth of cut (mm)

Feed rate (mm/min)

Width-to-thickness (w/t) ratio of a discontinuous chip

Uncoated carbide (UCC) tool

TiAlN coated carbide tool

PCD tool

1

3000

0.5

100

2.568

82.829

9.454

2

3000

1

200

1.959

17.44

10.246

3

3000

1.5

300

8.396

7.726

34.869

4

4000

0.5

100

11.139

18.514

10.014

5

4000

1

200

1.005

19.437

6.033

6

4000

1.5

300

6.378

19.279

10.615

7

5000

0.5

100

8.222

9.184

19.494

8

5000

1

200

6.323

11.486

25.008

9

5000

1.5

300

14

9.623

39.109