Laser-Gas Metal Arc (GMA) hybrid welding is fast making the transition from laboratory to production, in industries as diverse as shipbuilding to automobile manufacture. For the past 3 years, our team has striven to both develop a hybrid welding process for steel pipe, and to specify, build, and install a hybrid pipe welding system in a General Dynamics NASSCO shipyard. In March 2007, the syste...

Abstract Activated tungsten inert gas (A-TIG) welding is one variant of conventional TIG where a thin layer suitable activating flux deposited on the parent components prior to constituting arc in order harness enhanced penetration. Despite several benefits, industries are still reluctant overwhelmingly using this new variant. This article attempts highlight productivity benefits employing A-TI...

The Activated Tungsten Inert Gas welding (A-TIG) technique is characterized by its capability to impart enhanced penetration in single pass welding. Weld bead shape achieved A-TIG has a major part deciding the final quality of weld. Various machining variables influence weld and hence an optimum combination utmost importance. current study reported optimization integrating Response Surface Meth...

Abstract. It is possible to assess the thermal efficiency of welding shielding gases by means of the arc temperature field analysis. Since this approach opens a remarkable study field to assess different shielding gases, giving support for dealing with advantages and disadvantages of commercial gas mixtures, there is a research line under development, which goal is to find techniques to measure...

The probable reasons for evolution of weld porosity and solidification cracking and the structure- property relationship in aluminium welds were investigated. Aluminium plates (1xxx series) were welded by Tungsten Inert Gas (TIG) welding process, 5356 filler metal was used and heat input was controlled by varying welding current (145A, 175A and 195A). The welded samples were examined under opti...

Abstract To increase productivity when joining galvanised sheet metal, metal inert gas (MIG) and tungsten (TIG) arc brazing are combined in a hybrid process. This coupling of two processes increases speed reduces weld reinforcement the tendency to spatter. Because arcs 6 mm apart, they influence each other. Therefore, blowing action is major challenge brazing. A current modulation optimal relat...