Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process

Stuart Campbell, Alexander Galloway, Norman McPherson, Duncan Camilleri, Daniel Micallef

Research output: Contribution to conferencePaper

Abstract

Gas tungsten arc welding requires a gas shield to be present in order to protect the arc area from contamination by atmospheric gases. As a result of each gas having its own unique thermophysical properties, the shielding gas selected can have a major influence on the arc stability, welding speed, weld appearance
and geometry, mechanical properties and fume generation.
Alternating shielding gases is a relatively new method of discreetly supplying two different shielding gases to the welding region in order to take advantage of the beneficial properties of each gas, as well as the inherent pulsing effects generated. As part of an ongoing process to fully evaluate the effects of this novel supply method, a computational fluid dynamics model has been generated to include the gas dependent thermodynamic and transport properties in order to evaluate the effects that an alternating gas supply has on the arc plasma. Experimental trials have also been conducted to validate the model arc profile predictions.

Conference

ConferenceInternational Conference on Materials and Product Technology, ICMPT14
CountryCanada
CityVancouver
Period7/08/148/08/14
Internet address

Fingerprint

Magnetohydrodynamics
Shielding
Arc of a curve
Gases
Modeling
Welding
Thermodynamic properties
Gas
Tungsten
Fumes
Gas supply
Electric arc welding
Evaluate
Thermodynamic Properties
Transport Properties
Fluid Model
Transport properties
Contamination
Computational Fluid Dynamics
Dynamic models

Keywords

  • alternating shielding gases
  • ANSYS CFX
  • ags tungsten arc welding (GTAW)
  • magnetohydrodynamics (MHD)

Cite this

Campbell, S., Galloway, A., McPherson, N., Camilleri, D., & Micallef, D. (2014). Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process. Paper presented at International Conference on Materials and Product Technology, ICMPT14, Vancouver, Canada.
Campbell, Stuart ; Galloway, Alexander ; McPherson, Norman ; Camilleri, Duncan ; Micallef, Daniel. / Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process. Paper presented at International Conference on Materials and Product Technology, ICMPT14, Vancouver, Canada.1 p.
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abstract = "Gas tungsten arc welding requires a gas shield to be present in order to protect the arc area from contamination by atmospheric gases. As a result of each gas having its own unique thermophysical properties, the shielding gas selected can have a major influence on the arc stability, welding speed, weld appearanceand geometry, mechanical properties and fume generation.Alternating shielding gases is a relatively new method of discreetly supplying two different shielding gases to the welding region in order to take advantage of the beneficial properties of each gas, as well as the inherent pulsing effects generated. As part of an ongoing process to fully evaluate the effects of this novel supply method, a computational fluid dynamics model has been generated to include the gas dependent thermodynamic and transport properties in order to evaluate the effects that an alternating gas supply has on the arc plasma. Experimental trials have also been conducted to validate the model arc profile predictions.",
keywords = "alternating shielding gases , ANSYS CFX, ags tungsten arc welding (GTAW), magnetohydrodynamics (MHD)",
author = "Stuart Campbell and Alexander Galloway and Norman McPherson and Duncan Camilleri and Daniel Micallef",
note = "Abstract Only; International Conference on Materials and Product Technology, ICMPT14 ; Conference date: 07-08-2014 Through 08-08-2014",
year = "2014",
month = "8",
day = "7",
language = "English",
url = "http://www.waset.org/conference/2014/08/vancouver/ICMPT",

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Campbell, S, Galloway, A, McPherson, N, Camilleri, D & Micallef, D 2014, 'Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process' Paper presented at International Conference on Materials and Product Technology, ICMPT14, Vancouver, Canada, 7/08/14 - 8/08/14, .

Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process. / Campbell, Stuart; Galloway, Alexander; McPherson, Norman; Camilleri, Duncan; Micallef, Daniel.

2014. Paper presented at International Conference on Materials and Product Technology, ICMPT14, Vancouver, Canada.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process

AU - Campbell, Stuart

AU - Galloway, Alexander

AU - McPherson, Norman

AU - Camilleri, Duncan

AU - Micallef, Daniel

N1 - Abstract Only

PY - 2014/8/7

Y1 - 2014/8/7

N2 - Gas tungsten arc welding requires a gas shield to be present in order to protect the arc area from contamination by atmospheric gases. As a result of each gas having its own unique thermophysical properties, the shielding gas selected can have a major influence on the arc stability, welding speed, weld appearanceand geometry, mechanical properties and fume generation.Alternating shielding gases is a relatively new method of discreetly supplying two different shielding gases to the welding region in order to take advantage of the beneficial properties of each gas, as well as the inherent pulsing effects generated. As part of an ongoing process to fully evaluate the effects of this novel supply method, a computational fluid dynamics model has been generated to include the gas dependent thermodynamic and transport properties in order to evaluate the effects that an alternating gas supply has on the arc plasma. Experimental trials have also been conducted to validate the model arc profile predictions.

AB - Gas tungsten arc welding requires a gas shield to be present in order to protect the arc area from contamination by atmospheric gases. As a result of each gas having its own unique thermophysical properties, the shielding gas selected can have a major influence on the arc stability, welding speed, weld appearanceand geometry, mechanical properties and fume generation.Alternating shielding gases is a relatively new method of discreetly supplying two different shielding gases to the welding region in order to take advantage of the beneficial properties of each gas, as well as the inherent pulsing effects generated. As part of an ongoing process to fully evaluate the effects of this novel supply method, a computational fluid dynamics model has been generated to include the gas dependent thermodynamic and transport properties in order to evaluate the effects that an alternating gas supply has on the arc plasma. Experimental trials have also been conducted to validate the model arc profile predictions.

KW - alternating shielding gases

KW - ANSYS CFX

KW - ags tungsten arc welding (GTAW)

KW - magnetohydrodynamics (MHD)

UR - http://www.waset.org/cnference/2014/08/vancouver/ICMPT

M3 - Paper

ER -

Campbell S, Galloway A, McPherson N, Camilleri D, Micallef D. Modelling magnetohydrodynamics to investigate variation of shielding gases on arc characteristics in the GTAW process. 2014. Paper presented at International Conference on Materials and Product Technology, ICMPT14, Vancouver, Canada.