Topic
Electric resistance welding
About: Electric resistance welding is a research topic. Over the lifetime, 16761 publications have been published within this topic receiving 154851 citations.
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TL;DR: In this paper, a mathematical model was developed to predict the corrosion resistance of friction stir welded AA2219 aluminium alloy by incorporating FSW process parameters, such as tool pin profile, rotational speed, welding speed and axial force.
121 citations
TL;DR: In this paper, a numerical model combining the methods of enthalpy, effective-viscosity and volume-of-fluid is developed to simulate the metal transfer process in gas metal arc welding.
Abstract: A numerical model combining the methods of enthalpy, effective-viscosity and volume-of-fluid is developed to simulate the metal transfer process in gas metal arc welding. The model describes not only the influence on droplet profile and transfer frequency of electromagnetic force, surface tension, and gravity, but it can also model the nonisothermal phenomena such as heat transfer and phase change. The model has been used to study the shape of the melting interface on the welding wire, the droplet oscillation at wire tip, the characteristics of relevant physical variables and their roles in metal transfer. We find that the taper formation in spray transfer is closely related to the heat input on the unmelted portion of the welding wire, and the taper formation affects the globular–spray transition by decelerating the transfer process. The formation of satellite drops during the metal transfer process is also considered. High-speed photography, laser-shadow imaging, and metallographic analysis validate the numerical model, and recommendations are made on the topics that require further consideration for a more accurate metal transfer model.
121 citations
121 citations
TL;DR: In this article, an optimization of ultrasonic spot welding parameters for joining 3003 Aluminum alloy with 304 Stainless steel was performed at various clamping pressures and energy levels for investigating its effect on microstructure, mechanical properties and bond quality of the weld.
121 citations
01 May 2005
TL;DR: Pulse gas metal arc welding (GMAW-P) as mentioned in this paper is a popular method for welding that produces spray transfer at lower mean currents than traditional arc welding and has been shown to improve welding performance.
Abstract: Environmental concerns have driven manufactures to look for alternative materials like aluminium that are lighter in weight and possess good thermal and electrical conductivity. However, fabrication of alternative materials presents a considerable challenge for fabrication in volume production. Welding is one of the most common fabrication processes. Good thermal and electrical conductivity act as a drawback
for welding and generally results in excessive heating of base material. Pulse gas metal arc welding (GMAW-P) overcomes this drawback by producing spray transfer at lower mean currents. Modern welding has become complex due to need for setting up of combination of large number of welding parameters to achieve best quality of weld. Trial and error methods are impractical. In addition, there are many facets of disturbances and each has its own source and mitigation techniques. This need has resulted in several advancements in GMAW-P technology. This paper reviews progress in performance of GMAW-P technology.
120 citations