Investigation of Effects of Mig Welding on Corrosion Behaviour of AISI 1010 Carbon Steel
This paper presents the corrosion behaviour of welded low carbon steel at different welding voltages and filler materials. The welding process was conducted on butt joint 
specimens using the metal inert gas (MIG) technique at a welding voltage range of 19 to 21 V with 1 V interval, and the filler materials used were ER 308L and ER 70S-6 with 
1.2 mm diameter. Heat treatment through full annealing was done to the welded low carbon steel, and the corrosion behaviour was tested using a synthetic seawater 
environment with 3.5 wt% NaCl. Microstructure changes were observed using a scanning electron microscope (SEM). The results showed that the corrosion rate decreased when the welding voltage increased, as it directly affected the welding heat input. The welding heat input was found to have a significant effect on the corrosion rate as it changed the ferrite content in the microstructure of the specimens. Decrease in the corrosion rate was also found when the full annealing process was done to the 
specimens and ER 308L filler material was used. From a metallographic study, iron oxides and pitting were found on the surface of the exposed area after the corrosion test. 
It is apparent that the combination of higher welding voltage, heat treatment and the use of ER 308L filler material can reduce the corrosion rate of AISI 1010 carbon steel.
Study of Resistance Spot Welding Between AISI 301 Stainless Steel and AISI 1020 Carbon Steel Dissimilar Alloys
Joining dissimilar metals has recently become very popular in industries because of the advantages associated with the weld joint. This paper focuses on an investigation of mechanical and material properties, and the optimization of mechanical properties in resistance spot welding methods 
in lap configurations between AISI 301 stainless steel 
and AISI 1020 carbon steel.The Taguchi method was used 
to design experiments. Welding was conducted using a spot welder. Tensile and Charpy impact test specimens 
were 
prepared 
from 
the welded 
sheets 
in appropriate dimensions 
and 
tensile and 
Charpy 
impact 
test 
s 
were performed 
for 
each specimen. The 
depth and width of weld nuggets 
were investig 
ated. 
It can be concluded from the investigation that the welding joint in 
this method can offer moderate strength and moderate 
Charpy 
impact energy. 
From the 
results of the Taguchi analysis, the combination of optimum parameters for dissimilar 
stainless s 
teel 
- 
carbon 
steel 
resistance spot welding 
is 
: 
welding 
current 
, 
5.0kA 
; 
welding 
squeeze time 
, 
3.0 cycle 
; 
and welding pressure 
, 
40 psi. 
In order to 
improve 
significant 
mechanical and metallurgical 
properties of the joint, o 
ther variable parameters like 
voltag 
e, electrode 
tip 
diameter 
etc 
. 
can 
also 
be 
introduced and 
investigated 
so that 
the 
most influential parameters 
and their suitable ranges 
can be 
identified 
.
Effects of Spot Diameter and Sheets Thickness on Fatigue Life of Spot Welded Structure based on FEA Approach
This study presents the effect of the spot weld and sheets thickness on the fatigue life of the of the spot-weld joints to predict the lifetime and location of the weakest spot-welds due to the variable amplitude loading conditions. A simple model was used to illustrate the technique of spot-weld fatigue analysis. Finite element model and analysis were carried out utilizing the finite element analysis commercial codes. Linear elastic finite element analysis was carried out to predict the stress state along the weld direction. It can be seen from the results that the predicted life greatly influence the sheet thickness, nugget diameter and loading conditions of the model. Acquired results were shown the predicted life for the nugget and the two sheets around the circumference of the spot-weld at which angle the worst damage occurs. The spot-welding fatigue analysis techniques are awfully essential for automotive structure design.