Modeling of GMA Weld Pools With Consideration of Droplet Impact

[+] Author and Article Information
Zhen Ning Cao, Pingsha Dong

Center for Welded Structures Research, Battelle, 505 King Avenue, Columbus, OH 43201-2693

J. Eng. Mater. Technol 120(4), 313-320 (Oct 01, 1998) (8 pages) doi:10.1115/1.2807020 History: Received March 27, 1998; Revised April 19, 1998; Online November 27, 2007


A three-dimensional weld pool model has been developed to study the fluid flow and heat transfer process during gas metal arc (GMA) welding. Both droplet heat content and impact force were considered in analyzing the effect of droplets on the formation of weld pool. The fluid flow in the weld pool was induced by the presence of surface tension, electromagnetic and buoyancy force. The surface deformation of weld pool was calculated by considering arc pressure and droplet impact force. Computational results under partial and full penetration welding conditions were obtained. The effect of heat flow and fluid flow characteristics on weld pool geometry was discussed, particularly with respect to the presence of droplet heat input and impact force.

Copyright © 1998 by The American Society of Mechanical Engineers
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