Investigation on Surface Roughness of Inconel 718 in Photochemical Machining

Table 2

Experimental layout with coded and actual values.

Run	Coded values			Actual values			Surface finish (µm)
	Temperature (°C)	Concentration (g/L)	Time (min)	Temperature (°C)	Concentration (g/L)	Time (min)
01	1	1	1	45	500	20	0.660
02	1	1	2	45	500	30	0.535
03	1	1	3	45	500	40	0.480
04	1	2	1	45	550	20	0.479
05	1	2	2	45	550	30	0.462
06	1	2	3	45	550	40	0.457
07	1	3	1	45	600	20	0.450
08	1	3	2	45	600	30	0.418
09	1	3	3	45	600	40	0.399
10	2	1	1	50	500	20	0.390
11	2	1	2	50	500	30	0.375
12	2	1	3	50	500	40	0.339
13	2	2	1	50	550	20	0.298
14	2	2	2	50	550	30	0.297
15	2	2	3	50	550	40	0.296
16	2	3	1	50	600	20	0.281
17	2	3	2	50	600	30	0.278
18	2	3	3	50	600	40	0.271
19	3	1	1	55	500	20	0.268
20	3	1	2	55	500	30	0.257
21	3	1	3	55	500	40	0.252
22	3	2	1	55	550	20	0.210
23	3	2	2	55	550	30	0.207
24	3	2	3	55	550	40	0.207
25	3	3	1	55	600	20	0.205
26	3	3	2	55	600	30	0.203
27	3	3	3	55	600	40	0.201