A comparative study of the mechanical properties of 6061-T6 GMA welds obtained by the indirect electric arc (IEA) and the modified indirect electric arc (MIEA)

Fusion Welding with Indirect Electric Arc

“…It is thus the transformation of '' into ' the responsible of the decrease in hardening of the  matrix due to the incoherence of the ' phase caused by the thermodynamic instability of '' in a welding process. It is worthy to mention that the MIEA further increased the mechanical strength of this alloy as compared to the IEA joint (Ambriz et al, 2009). Fig.…”

“…This advantage means also a reduction in the thermal affection of the base metal and therefore a minimization in the loss of strength in heat treatable aluminium alloys. To prove this, plates of an Al-6061-T6 were welded with the IEA technique and the results were compared with a single V joint (Ambriz et al, 2009). Table 1 shows the results of the mechanical properties under tension of the welded joints in the as-welded condition.…”

“…Table 1. Mechanical properties of the weldments in the as-welded condition (Ambriz et al, 2009). Fig.…”

“…12. Microhardness profiles for; a) the single V joint and b) the IEA joint preheated to 100°C (Ambriz et al, 2009). Fig.…”

Thermal analysis of GMAW process using Finite Element Method and experimental data

“…The effect of heat generated by the Gas Metal Arc Welding (GMAW) process on Al-6061-T6 alloy has been widely studied in the literature [2][3][4][5] and the GMAW process itself had been described by several authors [2], [6], [7]. Thus, different aspects of the process had being studied, including the residual strength, overthickness, porosity, cracking and the degree of involvement of heat resistance.…”