This study evaluates the macrostructure, microstructure, hardness, and tensile strength in dissimilar metal welding applied to bus body construction. The process involved joining hollow stainless steel galvanized at dimensions of 80 x 40 3.2 mm through Gas Metal Arc Welding (GMAW). current was varied 90, 100, 110 A while ER70S-6 electrodes with diameters 0.8 1.0 were used. results showed that e...

When the gas metal arc welding (GMAW) process is applied in shipbuilding and heavy equipment industries, it important to increase amount of on weld without defects. Application tandem GMAW can reduce man-hours increased owing multipass productivity. In industry sites, weldments are long large; thus, a carriage-type bed generally used. Accordingly, overall lengths cables system increased; voltag...

The dynamic characteristics of droplet transfer are extremely complicated with the combined effects gravity force and weaving motion during vertical-up welding on thick plate. In this paper, we firstly observed behavior under various parameters high-speed photography electrical signals pulsed gas metal arc (P-GMAW). Then, investigated influences different shape molten pool as well characteristi...

Parameters optimization has become a gateway to achieving quality welds with improved properties desirable for construction and industrial applications. The complex interaction of welding input parameters requires process achieve optimal responses (s). This study reports the Gas Metal Arc Welding (GMAW) ultimate tensile strength in AISI 1008 steel joints. Three levels arc voltage, current, gas ...

This article analyzes the transient complex heat transfer and fluid flow in molten metal and arc plasma during the gas metal arc welding process. The model predicts the formation, growth, detachment, and transfer of droplets from the tip of a continuously fed electrode under the influences of several competing forces including gravity, electromagnetic force, arc pressure, plasma shear stress, a...

In mechanized or automatic GMAW welding, when necessary, weaving is usually performed by mechanical devices. On the other hand, magnetic fields are commonly used for same purpose in GTA welding. Experiments were carried out using with short-circuit, and pulsed metal transfer which controlled oscillation was applied. A clear influence of imposed field on process stability observed, its effect as...

This paper gives a recent progress of welding process research in Japan, especially, an instance in the capability of the visualization and prediction of welding arcs, though the dynamic observations of spectral image by a high-speed digital video-camera with a monochromator and also the calculations by numerical models. The dynamic observations lead to visualizations of metal vapor behavior in...

Selecting a process for welding large scale equipment on site demands special expertise due to the numerous variables be considered. This paper is aims applying decision support methodology selection of 16000 cubic meter storage tank welded site. Five processes are chosen select from, namely, Gas Metal Arc Welding (GMAW), Shielded (SMAW), Submerged (SAW), Flux Cord (FCAW) and Tungsten (GTAW). T...

This paper presents a novel approach to welding thick steel plates that offers time and energy savings compared with conventional techniques. The combination of gas metal arc (GMAW) hot-wire technology simplifies the joint configuration enhances process tolerance. In this study, square butt was prepared as-cut edges thickness 15 mm. relationship between current deposition rate solo GMAW showed ...

In this paper, the parameter optimization of hybrid-tandem gas metal arc welding (GMAW) process was studied. The GMAW uses an additional filler-wire with opposite polarity in contrast to conventional tandem process. process, more parameters and relationship between causing strong nonlinearity should be considered. analysis variance-based Gaussian regression (ANOVA-GPR) method implemented constr...