The experiments of wire arc additive manufacturing (WAAM) with general pulsed gas metal welding (GMAW) machine were performed to optimize process parameters. As optimized conditions, 140A current, 34 V voltage, 40 cm/min speed, and 15 mm contact tip work distance (CTWD), selected. Welding current voltage affected heat input. Lower deposition, short circuit mode, spatters obtained by insufficien...

In this work, a pulsed welding process has been investigated to highlight how a time varying profile of current impacts on the metal transfer dynamics. First, the process has been recorded using high-speed camera, allowing to qualitatively evaluate the effectiveness of metal transfer and the synchronization of the droplet detachment with current peaks. Second, a timedependent axi-symmetric 2-D ...

A study was conducted on the arc and melting efficiency of the plasma arc, gas tungsten arc, gas metal arc, and submerged arc welding processes. The results of this work are extended to develop a quantitative method for estimating weld metal dilution in a companion paper. Arc efficiency was determined as a function of current for each process using A36 steel base metal. Melting efficiency was e...

The manufacturing of structures ranging from bridges and machinery to all types seaborne vehicles nuclear reactors space rockets has made considerable use arc welding technologies. This is as a result benefits including increased joint efficiency, air water tightness, no thickness restriction (0.6 25 mm), decreased fabrication time cost, etc. when compared alternative methods. Gas metal (GMAW) ...

Abstract This paper reports an investigation to improve fundamental knowledge and understanding of 3D printing steel in structural engineering. The process method examined is Wire Arc Additive Manufacturing (WAAM) for the manufacturing large-sized components. mechanical properties printed Union K 40 - GMAW are determined benchmarked against measured EN 8 carbon medium steel. results presented d...