International Journal of Manufacturing Engineering / 2014 / Article / Tab 4

Research Article

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 numberPeak current (Amperes)Back current (Amperes)Pulse rate (pulses/second)Pulse width (%)Grain size (Microns)Hardness (VHN)Ultimate tensile strength (UTS) (Mpa)

1−1−1−1−120.812198713
21−1−1−130.226190705
3−11−1−121.508199718
411−1−127.536193706
5−1−11−127.323193706
61−11−125.206195710
7−111−125.994195705
8111−123.491197706
9−1−1−1126.290194705
101−1−1129.835190700
11−11−1120.605200715
1211−1127.764193708
13−1−11130.095190698
141−11126.109194706
15−111127.385193704
16111125.013195710
17−200020.788196710
18200025.830195706
190−20031.663188701
20020027.263193708
2100−2025.270195712
22002026.030194705
23000−224.626195711
24000226.626194705
25000024.845196710
26000024.845196710
27000020.145200720
28000024.845195710
29000020.045201718
30000024.845195710
31000020.445198712