Weld pool dynamics and the formation of ripples in 3D gas metal arc welding
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Authors
Hu, Junling
Guo, H.
Tsai, Hai-Lung
Issue Date
2007
Type
Article
Language
en_US
Keywords
Engineering , Gas metal arc welding (GMAW) , Ripples , Weld pool dynamics
Alternative Title
Abstract
This article studies the transient weld pool dynamics under the periodical impingement of filler droplets that carry mass, momentum, thermal energy, and species in a moving 3D gas metal arc welding. The complicated transport phenomena in the weld pool are caused by the combined effect of droplet impingement, gravity, electromagnetic force, plasma arc force, and surface tension force (Marangoni effect). The weld pool shape and the distributions of temperature, velocity, and species in the weld pool are calculated as a function of time. The phenomena of ‘‘open and close-up” for a crater in the weld pool and the corresponding weld pool dynamics are analyzed. The commonly observed ripples at the surface of a solidified weld bead are, for the first time, predicted by the present model. Detailed mechanisms leading to the formation of ripples are discussed.
Description
© 2008, Elsevier. Licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International
Citation
J. HU, H. Gou, H. Tsai, "Weld pool dynamics and the formation of ripples in 3D gas metal arc welding," International Journal of Heat and Mass Transfer, vol. 51, no. 9-10, 2007.
Publisher
Elsevier
License
Journal
Volume
Issue
PubMed ID
DOI
ISSN
0017-9310