Finite Element Simulation of Laser Spot Welding

A. De, S. K. Maiti, C. A. Walsh and H. K. D. H. Bhadeshia


This work deals with a two-dimensional axi-symmetric finite element analysis of heat flow during laser spot formation taking into account the temperature dependance of physical properties and latent heats of transformation. An analysis based on conduction heat transfer alone, but using the Goldak approximation to the heat source, seems to be sufficient to estimate the transition to keyhole formation during laser spot welding, although there are two fitting-parameters needed to obtain agreement with experimental data. Transient temperature isotherms and the weld pool dimensions are predicted using the model; the latter are found to compare well with measurements of weld bead dimensions. The results show that the key-hole mode is stimulated using either a high laser power and low on-time or a low laser power and high on-time. The outcomes are found to be sensitive to the assumed absorptivity and to the weld pool depth.

Science and Technology of Welding and Joining, Vol. 8, 2003, 377-384.

Download PDF file of paper(5 Mb)

Related paper.

Archive of figures, presentation etc.

Welding Metallurgy

Superalloys Titanium Davenport Hot Delta
Satoh Fields Piping Seamless Poles
Neural Networks Envelope Extraordinary ductility Problems Low temperatures

PT Group Home Materials Algorithms