Numerical modeling of keyhole dynamics in laser welding

2003 ◽  
Author(s):  
Wen-Hai Zhang ◽  
Jun Zhou ◽  
Hai-Lung Tsai
Keyword(s):  
Numerical Modeling ◽  
Laser Welding ◽  
Keyhole Dynamics

Melt-pool and keyhole dynamics during thin-plate laser welding of steel

1993 ◽  
Author(s):  
K. Williams ◽  
William O'Neill ◽  
William M. Steen
Keyword(s):  
Laser Welding ◽  
Thin Plate ◽  
Melt Pool ◽  
Keyhole Dynamics

scholarly journals A Comparative Study of Analytical Rosenthal, Finite Element, and Experimental Approaches in Laser Welding of AA5456 Alloy

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 436 ◽  
Author(s):  
Hamidreza Hekmatjou ◽  
Zhi Zeng ◽  
Jiajia Shen ◽  
J. P. Oliveira ◽  
Homam Naffakh-Moosavy
Keyword(s):  
Finite Element ◽  
Numerical Modeling ◽  
Laser Welding ◽  
High Energy ◽  
Experimental Results ◽  
High Energy Density ◽  
Analytical Equation ◽  
Fe Model ◽  
Melt Pool ◽  
Analytical Approaches

The thermal regime and microstructural phenomenon are studied by using finite-element (FE) modelling and the analytical Rosenthal equation during laser welding of aluminum alloy 5456 (AA5456) components. A major goal is to determine the merits and demerits of this analytical equation which can be an alternative to FE analysis, and to evaluate the effect of imperative assumptions on predicted consequences. Using results from the analytical and numerical approaches in conjunction with experiments, different physical features are compared. In this study, the results obtained from experiments in terms of melt pool shapes are compared with the predicted ones achieved from the numerical and analytical approaches in which the FE model is more accurate than the Rosenthal equation in the estimation of the melt pool dimensions. Furthermore, as to the partially melted zones, the estimations achieved from the numerical modeling are more genuine than ones from the analytical equation with regards to the experimental results. At high energy density, near keyhole welding mode, the reported results show that experimental melt widths are supposed to be narrower than the fusion widths estimated by the analytical solution. The primary explanation could be the influence of thermal losses that occurred during convection and radiation, which are neglected in the Rosenthal equation. Additionally, the primary dendrite arm spacing (PDAS) estimated with the numerical modeling and the analytical Rosenthal solution is comparable with the experimental results obtained.

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