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A Comprehensive 3-D Model on Gas Metal Arc Welding

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dc.contributor.advisor Hu, Junling en_US
dc.contributor.author Guo, Hao en_US
dc.contributor.author Xu, Guang en_US
dc.contributor.author Hu, Junling en_US
dc.contributor.author Tsai, Hai-Lung en_US
dc.date.accessioned 2014-07-16T16:57:29Z
dc.date.available 2014-07-16T16:57:29Z
dc.date.issued 2006 en_US
dc.identifier.other 60d629f0-60ad-e34d-ec6a-f4062af7ba39 en_US
dc.identifier.uri https://scholarworks.bridgeport.edu/xmlui/handle/123456789/779
dc.description A unified comprehensive model was developed to simulate the transport phenomena occurring during the gas metal arc welding process. An interactive coupling between arc plasma; melting of a continuously fed electrode; droplet formation, detachment, transfer, and impingement onto the workpiece under the influences of several competing forces including gravity, electromagnetic force, arc pressure, plasma shear stress, and surface tension; and weld pool dynamics all were considered. The transient distributions of current density, arc temperature, arc pressure, melt flow velocity and melt temperature in the droplet and in the weld pool were all calculated. Based on the unified model, the following investigations were conducted: 1) the effect of welding current on droplet generation, especially the use of pulsed current to achieve the one-droplet-per-pulse (ODPP) metal transfer; 2) the determination of dynamically stabled wire feed speeds for given welding conditions; 3) the effects of surface active elements (Marangoni effect) on the weld pool flow and solidified weld profile; 4) the fundamental mechanisms leading to the formation of ripples; 5) the issues associated with the beginning and the end of the welding (limited penetration and the formations of crater); 6) the deflection of arc plasma by an external magnetic field. en_US
dc.subject Gas metal arc welding (GMAW) en_US
dc.subject Arc plasma en_US
dc.subject One droplet per pulse (ODPP) en_US
dc.subject Marangoni effect en_US
dc.title A Comprehensive 3-D Model on Gas Metal Arc Welding en_US
dc.type Article en_US
dc.event.location Jinan, Shandong, China en_US
dc.event.name International Symposium on Computer-Aided Welding Engineering en_US

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