Experimental Investigations of Nano Finishing Process on Nickel-Free Austenitic Stainless Steel by Grey Relational and Principal Component Analysis

Table 2

Results of Taguchi’s L27-series of experiments.

Input control parameters				Output responses		Normalising sequence		Deviation sequence		Grey relational coefficient		Principal components		Multiresponse performance index (MRPI)
Trial no	Pressure (bar)	Current (A)	NOC	MRR (mg/sec)	Ra (nm)	MRR (mg/sec)	Ra (nm)	MRR (mg/sec)	Ra (nm)	MRR (mg/sec)	Ra (nm)	MRR (mg/sec)	Ra (nm)
1	30	2	100	0.448	83.35	0.104	0.021	0.896	0.979	0.358	0.338	0.179	0.169	0.174
2	30	2	200	0.831	78.25	0.285	0.215	0.715	0.785	0.411	0.389	0.206	0.194	0.200
3	30	2	300	1.161	74.63	0.441	0.352	0.559	0.648	0.472	0.435	0.236	0.218	0.227
4	30	4	100	1.158	73.76	0.439	0.385	0.561	0.615	0.471	0.448	0.236	0.224	0.230
5	30	4	200	1.39	69.93	0.549	0.530	0.451	0.470	0.526	0.515	0.263	0.258	0.260
6	30	4	300	1.788	66.08	0.736	0.676	0.264	0.324	0.655	0.607	0.327	0.303	0.315
7	30	6	100	1.815	66.23	0.749	0.670	0.251	0.330	0.666	0.603	0.333	0.301	0.317
8	30	6	200	2.147	63.16	0.906	0.787	0.094	0.213	0.841	0.701	0.421	0.350	0.385
9	30	6	300	2.312	57.53	0.983	1.000	0.017	0.000	0.968	1.000	0.484	0.500	0.492
10	40	2	300	1.053	74.92	0.390	0.341	0.610	0.659	0.450	0.431	0.225	0.216	0.220
11	40	2	100	0.227	82.64	0.000	0.048	1.000	0.952	0.333	0.344	0.167	0.172	0.169
12	40	2	200	0.647	78.78	0.198	0.194	0.802	0.806	0.384	0.383	0.192	0.191	0.192
13	40	4	300	1.712	67.36	0.700	0.627	0.300	0.373	0.625	0.573	0.313	0.286	0.299
14	40	4	100	1.052	75.87	0.389	0.305	0.611	0.695	0.450	0.418	0.225	0.209	0.217
15	40	4	200	1.213	71.24	0.465	0.480	0.535	0.520	0.483	0.490	0.241	0.245	0.243
16	40	6	300	2.112	59.80	0.889	0.914	0.111	0.086	0.819	0.853	0.409	0.426	0.418
17	40	6	100	1.675	66.76	0.683	0.650	0.317	0.350	0.612	0.588	0.306	0.294	0.300
18	40	6	200	2.037	64.12	0.854	0.750	0.146	0.250	0.774	0.667	0.387	0.333	0.360
19	50	2	200	0.621	79.02	0.186	0.185	0.814	0.815	0.380	0.380	0.190	0.190	0.190
20	50	2	300	1.508	78.55	0.604	0.203	0.396	0.797	0.558	0.386	0.279	0.193	0.236
21	50	2	100	0.266	83.91	0.018	0.000	0.982	1.000	0.337	0.333	0.169	0.167	0.168
22	50	4	200	1.275	72.51	0.494	0.432	0.506	0.568	0.497	0.468	0.249	0.234	0.241
23	50	4	300	1.654	67.28	0.673	0.630	0.327	0.370	0.605	0.575	0.302	0.287	0.295
24	50	4	100	0.812	76.38	0.276	0.285	0.724	0.715	0.408	0.412	0.204	0.206	0.205
25	50	6	200	1.804	64.97	0.744	0.718	0.256	0.282	0.661	0.639	0.331	0.320	0.325
26	50	6	300	2.347	63.24	1.000	0.784	0.000	0.216	1.000	0.698	0.500	0.349	0.424
27	50	6	100	1.602	68.85	0.649	0.571	0.351	0.429	0.587	0.538	0.294	0.269	0.281