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Weld penetration sensing in pulsed gas tungsten arc welding based on arc voltage
Journal of Materials Processing Technology, 2016Abstract An alternative to the conventional weld penetration sensing methods in pulsed gas tungsten arc welding is proposed for implementation at manufacturing sites. The fluctuation amplitude of arc voltage in the peak duration (ΔUk) reflects the weld penetration status in a single-weld spot; a fully penetrated weld spot is obtained in the step-by ...
Shiqi Zhang, Shengsun Hu, Zhijiang Wang
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Arc Physics of Gas-Tungsten Arc Welding
1993Abstract The gas-tungsten arc welding (GTAW) process is performed using a welding arc between a nonconsumable tungsten-base electrode and the workpieces to be joined. The arc discharge requires a flow of electrons from the cathode through the arc column to the anode.
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Gas-Shielded Tungsten-Arc Welding
1976Gas-shielded tungsten-arc welding (called ‘T.I.G.’, ‘tungsteninert-gas’, or ‘Άrgon-arc’) is a fusion process that uses a virtually non-consumable electrode in a completely inert gas shield. The metal tungsten has the highest melting point of all metals, at 3410 °C.
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Modeling Three-Dimensional Plasma Arc in Gas Tungsten Arc Welding
Journal of Manufacturing Science and Engineering, 2012This article presents a three-dimensional (3D) mathematical model for the plasma arc in gas tungsten arc welding (GTAW). The velocity, pressure, temperature, electric potential, current density, and magnetic field of the plasma arc are calculated by solving the mass, momentum, and energy conservation equations coupled with electromagnetic equations ...
Gu Xu, J. Hu, Hai-Lung Tsai
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Effects of activating flux on arc phenomena in gas tungsten arc welding
Science and Technology of Welding and Joining, 2000Dramatic increases in the depth of weld bead penetration have been demonstrated by welding stainless steel using the gas tungsten arc (GTA) process with activating fluxes consisting of oxides and halides. However, there is no commonly agreed mechanism for the effect of flux on the process.
M. Ushio +5 more
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Cross touching behavior in arcing-wire gas tungsten arc welding
Journal of Materials Processing Technology, 2018Abstract Continuous cross touching metal transfer in arcing-wire gas tungsten arc welding using a constant-current power supply is proposed. With increasing wire feed rate, the metal transfer behavior changed from critical touching to completely touching to over touching.
Jun Wang +5 more
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Investigation on the Welding Temperature Field Measurement in Gas Tungsten Arc Welding
Materials Science Forum, 2011Based on the gas tungsten arc welding process this paper investigated the welding temperature field measurement and simulation of 945 steel plate and AZ31B magnesium alloy, using a non-contact and fast response measured temperature method-Infrared Radiation (IR)-which utilized the baffle to remove the arc and hot tungsten electrode interference, the ...
Wei Hua Chen +3 more
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Arc Welding Processes: Gas Tungsten Arc Welding: Electrode, Polarity and Pulse Variant
2021This chapter describes different types of tungsten electrodes used in GTA welding process besides selection of polarity and methods of initiating welding arc. Further, the basic principle of pulse gas tungsten arc welding process has also been presented.
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Mathematical model of arc in pulsed current gas tungsten arc welding
Journal of Physics D: Applied Physics, 1997A two-dimensional transient model is introduced to describe the heat transfer and fluid flow in pulsed gas tungsten arc (GTA) welding. The current continuity equation has been solved with the combined arc plasma - cathode system, independent of the assumption of the current density distribution on the cathode surface which was essential in previous ...
Fan, H G, Na, S-J Na, Suck-Joo, Shi, Y W
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Intelligent modelling and optimization of the gas tungsten arc welding process
Journal of Intelligent Manufacturing, 1999This paper describes an application of neural networks and simulated annealing (SA) algorithm to model and optimize the gas tungsten arc welding (GTAW) process. The relationships between welding process parameters and weld pool features are established based on neural networks.
Tarng, Y.S. +3 more
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