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- Title
Numerical Simulation of Droplet Filling Mode on Molten Pool and Keyhole during Double-Sided Laser Beam Welding of T-Joints.
- Authors
Peng, Jin; Liu, Jigao; Yang, Xiaohong; Ge, Jianya; Han, Peng; Wang, Xingxing; Li, Shuai; Yang, Zhibin
- Abstract
The effects of droplets filling the molten pools during the double-sided laser beam welding (DSLBW) of T-joints was established. The dynamic behavior of the keyhole and the molten pool under different droplet filling modes were analyzed. The results indicated that compared with the contact transition, the stability of metal flow on the keyhole wall was reduced by free transition and slight contact transition. At the later stage of the droplet entering the molten pool via free transition, slight contact transition, and contact transition, the maximum flow velocity of the keyhole wall was 5.33 m/s, 4.57 m/s, and 2.99 m/s, respectively. When the filling mode was free transition or slight contact transition, the keyhole collapsed at the later stage of the droplet entering the molten pool. However, when the filling mode was contact transition, the middle-upper part of the interconnected keyholes became thinner at the later stage of the droplet entering the molten pool. At the later stage of the droplet entering the molten pool via free transition, the flow vortex at the bottom of the keyhole disappeared and the melt at the bottom of the keyhole flowed to the rear of the molten pool, however, the vortex remained during slight contact transition and contact transition.
- Subjects
LASER welding; PLASMA arc welding; COMPUTER simulation; FLOW velocity
- Publication
Crystals (2073-4352), 2022, Vol 12, Issue 9, pN.PAG
- ISSN
2073-4352
- Publication type
Article
- DOI
10.3390/cryst12091268