Analysis and Optimization of Cutting Tool Coating Effects on Surface Roughness and Cutting Forces on Turning of AA 6061 Alloy

Table 4

Results of experiments and S/N ratio values.

Test ID	Control factors				Surface roughness value, Ra (μm)	S/N ration for Ra (dB)	Cutting force, Fc (N)	S/N for Fc (dB)
	A cutting tool (Ct)	B cutting speed (Vc)	C feed rate (f)	D depth of cut (a)
1	Uncoated	250	0.1	1	0.605	4.3648	87.2	−38.8103
2	Uncoated	250	0.15	1.5	1.127	−1.0384	141.93	−43.0415
3	Uncoated	250	0.2	2	2.033	−6.1627	213	−46.5676
4	Uncoated	300	0.1	1	0.46	6.7448	85.6	−38.6495
5	Uncoated	300	0.15	1.5	1.094	−0.7803	140.63	−42.9616
6	Uncoated	300	0.2	2	1.978	−5.9245	211.25	−46.4959
7	Uncoated	350	0.1	1.5	0.62	4.1521	105.99	−40.5053
8	Uncoated	350	0.15	2	1.364	−2.6962	176.31	−44.9255
9	Uncoated	350	0.2	1	2.112	−6.4938	130.53	−42.3142
10	Coated	250	0.1	2	1.167	−1.3414	157.09	−43.923
11	Coated	250	0.15	1	2.213	−6.8996	155.07	−43.8106
12	Coated	250	0.2	1.5	4.192	−12.4484	236.91	−47.4917
13	Coated	300	0.1	1.5	1.058	−0.4897	134.14	−42.5512
14	Coated	300	0.15	2	2.468	−7.8469	211.57	−46.5091
15	Coated	300	0.2	1	4.115	−12.2874	188.69	−45.515
16	Coated	350	0.1	2	0.868	1.2296	151.67	−43.618
17	Coated	350	0.15	1	2.241	−7.0088	148.75	−43.4491
18	Coated	350	0.2	1.5	3.944	−11.9187	224.12	−47.0096