Submerged arc welding is a complex metallurgical system involving various phases with temperature higher than 2000 °C. Since the hot weld pool shielded beneath flux, thermodynamic investigation on O content variation during process remains nebulous. Within this framework, approach has been proposed to estimate tendency of in metal overall submerged process. The modeling based assumptions Oxygen...

In this article the influence of welding parameters such as electrical current, feed rate and stick out on crack growth energy was investigated. Therefore, prepared specimens were welded in various conditions. Using the Minitab software, 18 states of 36 possible states were chosen and applied. Then a crack was crated on the weld metal and the force-displacement diagram was plotted. Comparison o...

This paper analyses the arc interference in an a.c. combined (both the pilot arc and the plasma arc exist in the welding process) plasma arc welding of aluminium alloys. This phenomenon results in an unstable welding process and weld formation. To maintain the pilot arc during the period when the electrode is positive, a cathode region must be formed in front of the tungsten electrode tip. Howe...

Arc plasma possesses a constriction phenomenon with a pulsed current. The constriction is created by the Lorentz force, the radial electromagnetic force during arc welding, which determines the energy distribution of the arc plasma. Welding experiments were carried out with ultra-high-frequency pulsed arc welding (UHFP-AW). Ultra-high-speed camera observations were produced for arc surveillance...

The present paper describes fuzzy logic simulation of shielded metal arc welding (SMAW) process to predict the Quality of weld joint. It describe the quality of weld joint & effect of welding current, voltage and welding speed on tensile strength of shielded metal arc pipe welded mild steel joints. An ERW Mild steel pipe I S 1239 of 6 mm thickness and 150 mm diameter were used as the base mater...

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...

A group of stainless steel arc welding processes was compared for emission rates of fume and hexavalent chromium, and costs per meter length of weld. The objective was to identify those with minimal emissions and also compare relative labor and consumables costs. The selection included flux-cored arc welding (FCAW), shielded-metal arc welding (SMAW), and multiple gas metal arc welding (GMAW) pr...

In order to investigate the effect of gas cutting during removal restraining jig on deformation after submerged arc welding, authors have conducted experiments a series processes using constraint plates in test specimen modeling deck steel bridge. this paper, an Idealized explicit FEM developed by is applied detail factors that cause springback plates. A welding and were modeled, then three-dim...

D. Bajic, University of Montenegro, Faculty of Mechanical Engineering, G. Vladimirovich Kuzmenko, E.O. Paton Electric Welding Institute, National Academy of Sciences Ukraine, I. Samardžić, J.J.Strossmayer university of Osijek, Mechanical Engineering Faculty in Slavonski Brod, Croatia The paper presents up-to-date achievements in application of a new method of arc welding of various rail profi l...

In order to study the effects of laser induced metal vapour on arc plasma during laser arc double sided welding (LADSW), emission spectroscopy techniques were utilised. The arc plasma in LADSW of 5A06 aluminium alloy was compared with conventional gas tungsten arc welding (GTAW) in this work. The electron temperature and density were estimated by the Saha– Boltzmann equation and the Stark broad...