Pores in laser beam welding: generation mechanism and impact on the melt flow

2018 ◽  
Author(s):  
Florian Fetzer ◽  
Haoyue Hu ◽  
Peter Berger ◽  
Rudolf Weber ◽  
Thomas Graf
Keyword(s):  
Laser Beam ◽  
Laser Beam Welding ◽  
Generation Mechanism ◽  
Melt Flow

scholarly journals Reduced finite-volume model for the fast numerical calculation of the fluid flow in the melt pool in laser beam welding

2021 ◽  
Vol 1135 (1) ◽  
pp. 012010
Author(s):  
Jonas Wagner ◽  
Peter Berger ◽  
Philipp He ◽  
Florian Fetzer ◽  
Rudolf Weber ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Laser Beam ◽  
Finite Volume ◽  
Weld Pool ◽  
Welding Speed ◽  
Laser Beam Welding ◽  
Melt Flow ◽  
Finite Volume Model ◽  
Volume Model ◽  
Weld Pool Geometry

Abstract In this paper we propose a reduced two-dimensional finite-volume model for the fast calculation of the melt flow. This model was used to determine the influence of the welding speed, viscosity in the melt and vapour flow inside of the keyhole on the fluid flow field, the temperature distribution, and the resulting weld-pool geometry for laser beam welding of aluminium. The reduced computational time resulting from this approach allows the fast qualitative investigation of different aspects of the melt flow over a wide range of parameters. It was found that the effect of viscosity within the melt is more pronounced for lower welding speeds whereas the effect of friction at the keyhole walls is more pronounced for higher welding speeds. The weld-pool geometry mainly depends on the welding speed.

Melt flow and thermal transfer during magnetically supported laser beam welding of thick aluminum alloy plates

2018 ◽  
Vol 254 ◽  
pp. 325-337 ◽  
Author(s):  
Jicheng Chen ◽  
Yanhong Wei ◽  
Xiaohong Zhan ◽  
Yi Li ◽  
Wenmin Ou ◽  
...  
Keyword(s):  
Aluminum Alloy ◽  
Laser Beam ◽  
Laser Beam Welding ◽  
Melt Flow ◽  
Thermal Transfer

X-ray investigation of melt flow behavior under magnetic stirring regime in laser beam welding of aluminum

2011 ◽  
Vol 23 (3) ◽  
pp. 032002 ◽  
Author(s):  
M. Gatzen ◽  
Z. Tang ◽  
F. Vollertsen ◽  
M. Mizutani ◽  
S. Katayama
Keyword(s):  
Laser Beam ◽  
Flow Behavior ◽  
Laser Beam Welding ◽  
Melt Flow ◽  
X Ray ◽  
Magnetic Stirring
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