Optimization of Fusion Zone Grain Size, Hardness, and Ultimate Tensile Strength of Pulsed Current Microplasma Arc Welded AISI 304L Sheets Using Genetic Algorithm

Table 4

Design matrix and experimental results.

Serial number	Peak current (Amperes)	Back current (Amperes)	Pulse rate (pulses/second)	Pulse width (%)	Grain size (Microns)	Hardness (VHN)	Ultimate tensile strength (UTS) (Mpa)
1	−1	−1	−1	−1	20.812	198	713
2	1	−1	−1	−1	30.226	190	705
3	−1	1	−1	−1	21.508	199	718
4	1	1	−1	−1	27.536	193	706
5	−1	−1	1	−1	27.323	193	706
6	1	−1	1	−1	25.206	195	710
7	−1	1	1	−1	25.994	195	705
8	1	1	1	−1	23.491	197	706
9	−1	−1	−1	1	26.290	194	705
10	1	−1	−1	1	29.835	190	700
11	−1	1	−1	1	20.605	200	715
12	1	1	−1	1	27.764	193	708
13	−1	−1	1	1	30.095	190	698
14	1	−1	1	1	26.109	194	706
15	−1	1	1	1	27.385	193	704
16	1	1	1	1	25.013	195	710
17	−2	0	0	0	20.788	196	710
18	2	0	0	0	25.830	195	706
19	0	−2	0	0	31.663	188	701
20	0	2	0	0	27.263	193	708
21	0	0	−2	0	25.270	195	712
22	0	0	2	0	26.030	194	705
23	0	0	0	−2	24.626	195	711
24	0	0	0	2	26.626	194	705
25	0	0	0	0	24.845	196	710
26	0	0	0	0	24.845	196	710
27	0	0	0	0	20.145	200	720
28	0	0	0	0	24.845	195	710
29	0	0	0	0	20.045	201	718
30	0	0	0	0	24.845	195	710
31	0	0	0	0	20.445	198	712