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Metals 2017, 7(8), 307; doi:10.3390/met7080307

FEM Simulation of Dissimilar Aluminum Titanium Fiber Laser Welding Using 2D and 3D Gaussian Heat Sources

1
Innovation Engineering Department, University of Salento, Via per Arnesano s.n., 73100 Lecce, Italy
2
DMMM Politecnico di Bari, Viale Japigia, 182, 70126 Bari, Italy
*
Author to whom correspondence should be addressed.
Received: 1 June 2017 / Revised: 2 August 2017 / Accepted: 8 August 2017 / Published: 10 August 2017
(This article belongs to the Special Issue Laser Welding)
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Abstract

For a dissimilar laser weld, the model of the heat source is a paramount boundary condition for the prediction of the thermal phenomena, which occur during the welding cycle. In this paper, both two-dimensional (2D) and three-dimensional (3D) Gaussian heat sources were studied for the thermal analysis of the fiber laser welding of titanium and aluminum dissimilar butt joint. The models were calibrated comparing the fusion zone of the experiment with that of the numerical model. The actual temperature during the welding cycle was registered by a thermocouple and used for validation of the numerical model. When it came to calculate the fusion zone dimensions in the transversal section, the 2D heat source showed more accurate results. The 3D heat source provided better results for the simulated weld pool and cooling rate. View Full-Text
Keywords: dissimilar welding; fiber laser; finite element analysis dissimilar welding; fiber laser; finite element analysis
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D’Ostuni, S.; Leo, P.; Casalino, G. FEM Simulation of Dissimilar Aluminum Titanium Fiber Laser Welding Using 2D and 3D Gaussian Heat Sources. Metals 2017, 7, 307.

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