About this Abstract |
Meeting |
2021 AWS Professional Program
|
Symposium
|
2021 AWS Professional Program
|
Presentation Title |
The Numerical Analysis of the Effect Mechanism of Welding Speed on the Instable Dynamic Behaviors of Molten Pool in the High Speed Laser Welding |
Author(s) |
Yuewei Ai, Xiaoying Liu, Yi Huang, Long Yu |
On-Site Speaker (Planned) |
Yuewei Ai |
Abstract Scope |
The dynamic behaviors of the molten pool are highly related to the welding speed in the fiber laser welding. The instable molten pool behaviors induced by the high welding speed easily results in the formation of welding defects including the humping, undercut and pore. A 3D numerical model is proposed to investigate the dynamic behaviors of molten pool formed in the low and high speed laser welding. The evolution process of the molten pool of the laser welding is analyzed in details with the increase of welding speed. The frequency and amplitude of the oscillating molten pool from the low speed welding and high speed welding conditions are compared. The factors which have great influence on the variation of dynamic behaviors of molten pool are analyzed by the numerical calculation. The variation mechanism of the molten pool dynamic behaviors from different laser welding speed is revealed by numerical simulation. The calculated results are validated by the experimental and literature results and they are kept in good agreement. The results show that the proposed model can be used to provide the new process method for improving the stability of molten pool and achieve the formation of excellent weld with high quality in the high speed laser welding. |
Proceedings Inclusion? |
Definite: Other |