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

Table 7

Comparison of GA and experimental values.

Welding parameters	Experimental values	GA values
Grain size
Peak current (Amperes)	7	6.634
Back current (Amperes)	4	3.851
Pulse rate (pulses/second)	40	36.386
Pulse width (%)	50	55.011
Grain size (Microns)	20.045	22.13219
Hardness
Peak current (Amperes)	7	6.517
Back current (Amperes)	4	4.117
Pulse rate (pulses/second)	40	30.276
Pulse width (%)	50	40.4843
Hardness (VHN)	201	201.033981
Ultimate tensile strength
Peak current (Amperes)	7	6.514
Back current (Amperes)	4	3.912
Pulse rate (pulses/second)	40	30.098
Pulse width (%)	50	40.004
Ultimate tensile strength (Mpa)	720	718.7376