Hg. Fan et R. Kovacevic, Droplet formation, detachment, and impingement on the molten pool in gas metal arc welding, MET MAT T B, 30(4), 1999, pp. 791-801
Citations number
29
Categorie Soggetti
Metallurgy
Journal title
METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE
A mathematical model is developed to describe the globular transfer in gas
metal are welding (GMAW). This work is both theoretical and experimental. U
sing the volume-of-fluid (VOF) method, the fluid-flow and heat-transfer phe
nomena are dynamically studied during the following processes: droplet form
ation and detachment, impingement of a droplet on a solid substrate, imping
ement of multiple droplets on the molten pool, and solidification after the
are extinguishes. A He-Ne laser, in conjunction with the shadow graphing t
echnique, is used to observe the metal transfer processes. Theoretical pred
ictions and experimental results are in close agreement, suggesting that th
e theoretical treatment of the model is good.