Driving Force Variation in Weld Pool Affected by Current Density and Flow Velocity of Gas Tungsten Arc Welding

2012 ◽  
Vol 132 (5) ◽  
pp. 486-492 ◽  
Author(s):  
Tadashi Sakai ◽  
Hiroyuki Taki ◽  
Toru Iwao ◽  
Shinichi Tashiro ◽  
Manabu Tanaka ◽  
...  
Keyword(s):  
Flow Velocity ◽  
Weld Pool ◽  
Current Density ◽  
Arc Welding ◽  
Driving Force ◽  
Gas Tungsten Arc Welding ◽  
Gas Tungsten Arc ◽  
Force Variation ◽  
Gas Tungsten

Modeling Three-Dimensional Plasma Arc in Gas Tungsten Arc Welding

2012 ◽  
Vol 134 (3) ◽  
Author(s):  
G. Xu ◽  
J. Hu ◽  
H. L. Tsai
Keyword(s):  
Magnetic Field ◽  
Weld Pool ◽  
Current Density ◽  
Arc Welding ◽  
Three Dimensional ◽  
Gas Tungsten Arc Welding ◽  
Plasma Arc ◽  
Gas Tungsten Arc ◽  
Pool Model ◽  
Gas Tungsten

This 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. The predicted results were compared with the published experimental data and good agreements were achieved. This 3D model can be used to study a nonaxisymmetric arc that may be caused by the presence of nonaxisymmetric weld pools, joint configurations, and perturbations such as an external magnetic field. This study also provides a method to calculate 3D arc pressure, heat flux, and current density on the surface of the weld pool which, if coupled with a weld pool model, will become a complete model of GTAW.

Modeling of Transport Phenomena in Gas Tungsten Arc Welding Arc

2012 ◽  
Author(s):  
X. Yang ◽  
J. Hu ◽  
J. Pallis
Keyword(s):  
Weld Pool ◽  
Current Density ◽  
Arc Welding ◽  
Transport Phenomena ◽  
Gas Tungsten Arc Welding ◽  
Anode Surface ◽  
Arc Plasma ◽  
Gas Tungsten Arc ◽  
Arc Model ◽  
Gas Tungsten

This paper developed a mathematical model to simulate the transport phenomena in the arc plasma of a gas tungsten arc welding (GTAW) process. The arc model simulated the electromagnetic field in three regions — cathode, arc plasma, and anode; and heat transfer and fluid flow in the arc region. The temperature, velocity, pressure, current density and electromagnetic fields are explored in the arc plasma region to study the arc plasma characteristics. The distributions of heat flux, current density, arc pressure and plasma shear stress at the anode surface are obtained as boundary conditions for weld pool models. The predicted results are compared with published results. The developed arc model will be coupled with a weld pool model to study the interaction between arc plasma and weld pool.

Influence of filler wire addition on weld pool oscillation during gas tungsten arc welding

2004 ◽  
Vol 9 (2) ◽  
pp. 163-168 ◽  
Author(s):  
B. Y. B. Yudodibroto ◽  
M. J. M. Hermans ◽  
Y. Hirata ◽  
G. den Ouden
Keyword(s):  
Weld Pool ◽  
Arc Welding ◽  
Gas Tungsten Arc Welding ◽  
Filler Wire ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

Heat Transfer Modelling and Investigation of the Effect of Pulse Frequency and Current in Pulsed Current Gas Tungsten Arc Welding

2014 ◽  
Vol 592-594 ◽  
pp. 395-399
Author(s):  
A. Prabakaran ◽  
R. Sellamuthu ◽  
Sanjivi Arul
Keyword(s):  
Heat Transfer ◽  
Weld Pool ◽  
Arc Welding ◽  
Gta Welding ◽  
Gas Tungsten Arc Welding ◽  
Transfer Model ◽  
Pulsed Current ◽  
Current Frequency ◽  
Gas Tungsten Arc ◽  
Gas Tungsten

Gas Tungsten Arc Welding (GTAW) involves several process parameters. In Pulsed Current GTAW frequency of pulse and pulse to time ratio differentiates the characteristics of weld pool geometry of from GTAW. In the present work a simple heat transfer model for Pulsed Current GTA welding was developed and the weld pool dimensions were experimentally verified with AISI 1020 steel. Relationship between speed and pulsed current frequency on weld pool dimension was studied. Weld pool dimension of pulsed and non-pulsed GTAW is studied.

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