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Study The Shielding Gas Effects On Transport Phenomena In GMAW Arc

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dc.contributor.advisor Hu, Junling en_US
dc.contributor.author Hu, Junling en_US
dc.contributor.author Rao, Z. H. en_US
dc.contributor.author Liao, S. M. en_US
dc.contributor.author Tsai, Hai-Lung en_US
dc.date.accessioned 2014-07-16T16:53:15Z
dc.date.available 2014-07-16T16:53:15Z
dc.date.issued 2009-07-07 en_US
dc.identifier.other 4cfbc3f4-234d-4f66-bf86-ef5978c64adb en_US
dc.identifier.uri https://scholarworks.bridgeport.edu/xmlui/handle/123456789/704
dc.description.abstract This article presents a numerical investigation on the transient transport phenomena including the arc plasma generation and evolution; droplet formation, detachment, transfer and impingement onto the workpiece; weld pool dynamics and final weld bead shape for pure argon and three argon-helium mixtures (75% Ar + 25% He, 50% Ar + 50% He, and 25% Ar + 75% He) during the GMAW process. The results indicate that the arcs in different shielding gases behave very differently due to the significant differences in thermophysical properties, including the ionization potential and the electrical conductivity, thermal conductivity, specific heat, and viscosity at high temperatures. For the same welding power input, the increase of helium content in the mixture leads to a stronger convergence of electric current at the workpiece and a stronger upward electromagnetic force near the workpiece, resulting in a cone-like plasma arc, which is in contrast to a bell-like plasma arc for argon-rich mixtures. en_US
dc.title Study The Shielding Gas Effects On Transport Phenomena In GMAW Arc en_US
dc.type Article en_US
dc.publication.name The 20th International Symposium on Transport Phenomena en_US


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