74
P. K. Nanavati et al.
Table 4
Process parameter
S. No.
Weld sample
Weld current
(A)
Crater current
(A)
Flow rate
(LPM)
Weld speed
(mm/min)
TIG angle (°)
Voltage (V)
Peak
temperature
(°C)
Heat input
(kJ/mm)
1
N-TIG
200
160
10–12
100
18–20
15
790
1.8
2
A-TIG
200
160
10–12
100
18–20
15.5
770
1.9
3
FB-TIG
200
160
10–12
100
18–20
17.5
996
2.1
4
FZ-TIG
200
160
10–12
100
18–20
15
758
1.8