Investigation on Microstructure and Tensile Properties of High-Strength AA2014 Aluminium Alloy Welds Joined by Pulsed CMT Welding Process

Table 3

Optimized P-CMT welding parameters.

Joint no.	P-CMT parameters					Heat input (KJ/mm)	UTS (MPa)	Probable reason
	Arc voltage (V)	Welding current (A)	Wire feed rate (mm/min)	Welding speed (mm/min)	Arc length
1	12	90	5500	450	15	0.121	—	Low heat input causes lack of fusion
2	12	100	5500	450	15	0.188	255	Moderate heat causes coarse grain
3	12	110	5500	450	15	0.223	303	Fine and recrystallized grains by an optimum heat
4	12	120	5500	450	15	0.312	286	Coarse and long grains cause by high heat input
5	12	130	5500	450	15	0.389	-	High heat input causes porosity and coarse grains