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Arc welding

About: Arc welding is a research topic. Over the lifetime, 25393 publications have been published within this topic receiving 168182 citations.


Papers
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Journal ArticleDOI
TL;DR: The welding flux for each of these processes must meet specific physical and chemical requirements to perform properly as discussed by the authors, and the flux viscosity is important because it controls the extent to which the flux can chemically alter the weld-metal composition, and it influences weld metal porosity, bead morphology, and the ability to make out-of-position weld deposits.
Abstract: Shielded-metal arc, submerged arc, and flux-cored arc welding processes (1) all rely on a flux to achieve an acceptable weld deposit. The welding flux for each of these processes must meet specific physical and chemical requirements to perform properly (2). A flux must have a melting range such that the weld metal solidifies before the molten slag does, and the resulting slag must have a density such that it floats to the top of the weld pool and collects there. The specific ranges of melting and density vary depending on the alloy being welded. The flux must also assist in main­ taining the arc plasma, in producing a shielding gas to protect the weld deposit from the atmosphere, and in limiting the amount of splatter. The flux viscosity is important because it controls the extent to which the flux can chemically alter the weld-metal composition, and it influences weld­ metal porosity, bead morphology, and the ability to make out-of-position weld deposits (3, 4). The flux must contain specific chemical additions to influence the weld metal's composition, microstructure, and properties.

66 citations

Journal ArticleDOI
TL;DR: Aluminium alloy 6111-T4 and steel DC04 1mm sheets have been successfully welded with a cycle time of 1.5 hours as mentioned in this paper. But the cycle time was not specified.

66 citations

Journal ArticleDOI
TL;DR: In this paper, the effect of three arc manipulation processes pulsed current welding, magnetic arc oscillation and the simultaneous application of pulsed currents and arc oscillations on the weld metal grain structure and tensile properties of the welds were investigated.
Abstract: Effect of three arc manipulation processes pulsed current welding, magnetic arc oscillation and the simultaneous application of pulsed current and arc oscillation, on the weld metal grain structure and tensile properties of the welds were investigated. Initial studies were conducted on autogenous welds made on 3.5 mm thick 2219-T6 plates, to identify and optimize, welding parameters resulting in fine equiaxed grains in the weld metal. Welds were made on 8.5 mm thick 2219-T87 plates using the optimized parameters and tested for tensile properties. All three techniques resulted in fine equiaxed grains in weld metals and optimum parameters were suggested based on the extent of refinement. Fine-grained weld metals exhibited better yield and ultimate tensile strengths and significant improvement in percent elongation. The reasons for the same were explained with the help of TEM and EPMA studies.

66 citations

Journal ArticleDOI
TL;DR: In this article, the overlapping welding in a keyhole mode with a magnetic field perpendicular to the welding direction was carried out between stainless steel 301 and aluminum alloy 5754 in this study, which indicated that the application of the magnetic field can modify the weld bead appearance and microstructure of the weld by the Lorenz force and thermoelectric magnetic force induced in the molten pool.

66 citations

Patent
13 Oct 1992
TL;DR: In this paper, an integrated optical sensor for arc welding having multifunction feedback control is presented, comprising generally a CCD camera and diode laser, which is positioned behind the arc torch for measuring weld pool position and width, standoff distance, and post-weld centerline cooling rate.
Abstract: An integrated optical sensor for arc welding having multifunction feedback control. The sensor, comprising generally a CCD camera and diode laser, is positioned behind the arc torch for measuring weld pool position and width, standoff distance, and post-weld centerline cooling rate. Computer process information from this sensor is passed to a controlling computer for use in feedback control loops to aid in the control of the welding process. Weld pool position and width are used in a feedback loop, by the weld controller, to track the weld pool relative to the weld joint. Sensor standoff distance is used in a feedback loop to control the contact tip to base metal distance during the welding process. Cooling rate information is used to determine the final metallurgical state of the weld bead and heat affected zone, thereby controlling post-weld mechanical properties.

66 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
202396
2022186
2021303
2020685
2019807
2018922