Investigation on the Mechanical Properties of TIG Welded AA6061 Alloy Weldments Using Different Aluminium Fillers

Abstract

In this research, the effect of filler weld material on
the mechanical properties of tungsten inert gas (TIG) welded
AA6061 alloy weldments have been investigated. The
microstructure of the base metal (BM) as well as weld metal
(WM) and heat affected zone (HAZ) was analyzed using optical
microscopy and scanning electron microscopy (SEM), and the
Vickers hardness of the samples were compared. Corrosion
resistance of the weld area was investigated in natural seawater
solution. Results for both filler samples indicate that the strength
of the WMs and HAZs is lower compared to BMs. In addition to
that, the weld joints of ER4043 samples show relatively higher
hardness compared to ER4047 samples. The corrosion test
results show that ER4043 sample has a lower corrosion rate value
compared to ER4047. It can be concluded that ER4043 samples
show better Vickers hardness value and corrosion resistance
compared to ER4047 samples