Modeling of transport phenomena in hybrid laser-MIG keyhole welding

Nd:YAG Laser Welding for Photonics Devices Packaging

“…The advantages of laser welding over conventional fusion welding processes include precise welds with a high aspect ratio, narrow heat affected zone (HAZ), very little thermal distortion, ease of automation, high welding speed, enhanced design flexibility, clean, high energy density, low heat input and an efficient process (Zhou & Tsai, 2008;Kazemi & Goldak, 2009). One of the key features of laser welding is the ability to weld without filler materials and it offers distinct advantages (Pang et al, 2008).…”

Modeling, Simulation and Experimental Studies of Distortions, Residual Stresses and Hydrogen Diffusion During Laser Welding of As-Rolled Steels

“…modeling of drop formation and impingement during TIG or MIG/MAG welding (Fan & Kovacevic, 1999;Zhou & Tsai, 2008); investigations of the influence of different chemical elements (such as S) on melt flow and the weld pool geometry (Lee et al, 1998;Mills et al, 1998;); simulation of the keyhole dynamics during laser welding (Ki et al, 2002;2002a;Pfeiffer & Schulz, 2009); or the analysis of asymmetric melt pool geometries due to dissimilar materials (Phanikumar et al, 2004). Consequences on residual stresses, distortions or microstructure in the solid state are not -as far as known -considered.…”

Multiscale, Multiphysics Numerical Modeling of Fusion Welding with Experimental Characterization and Validation

“…Multiscale, multiphysics numerical modeling turns out to be essential for accurately predicting the evolution of interfaces during the process of fusion welding. Although a variety of related numerical models has been developed separately at different scales for welding, such as models on atomic scale, 1,2 microscale, 3,4 and macroscale, 5,6 they have not been successfully integrated. 7 There has been some multiscale multiphysics modeling work carried out in the field of casting solidification, [8][9][10] but in comparison, the corresponding work in the field of welding is relatively rare.…”