Finite element simulation of magnesium alloys laser beam welding
TypeArticles dans des revues avec comité de lecture
In this paper, a three-dimensional finite element model is developed to simulate thermal history magnesium-based alloys during laser beam welding. Space–time temperature distributions in weldments are predicted from the beginning of welding to the final cooling. The finite element calculations were performed using Cast3M code with which the heat equation is solved considering a non-linear transient behaviour. The applied loading is a moving heat source that depends on process parameters such as power density, laser beam dimensions and welding speed, and it is associated to moving boundary conditions. Experiments were carried out to determine temperature evolution during welding and to measure the laser weld width. By comparing the thermal model answers with the measurements, it is found that numerical simulations results are in a good agreement with the experimental data.
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BELHADJ, Asma; MASSE, Jean-Eric; BARRALLIER, Laurent; BOUHAFS, Mahmoud; BESSROUR, Jamel (Laser Institute of America, 2010)Magnesium alloys have a 33% lower density than aluminum alloys, whereas they exhibit the same mechanical characteristics. Their application increases in many economic sectors, in particular, in aeronautic and automotive ...
COMMIN, Loreleï; DUMONT, Myriam; MASSE, Jean-Eric; BARRALLIER, Laurent (Elsevier, 2009)The temperature evolution during friction stir welding (FSW) and the resulting residual stresses of AZ31 Mg alloy were studied to get a better understanding of the mechanisms involved in this process. The relationship ...
ARBAOUI, Larbi; MASSE, Jean-Eric; BARRALLIER, Laurent; MOCELLIN, Katia (Springer-Verlag France, 2010)A finite element model has been developed to simulate an innovative laser rapid prototyping process. Several numerical developments have been implemented in order to simulate the main steps of the rapid prototyping process: ...
Influence of the microstructural changes and induced residual stresses on tensile properties of wrought magnesium alloy friction stir welds COMMIN, Loreleï; DUMONT, Myriam; ROTINAT, René; PIERRON, Fabrice; MASSE, Jean-Eric; BARRALLIER, Laurent (Elsevier, 2012)Friction stir welding induces a microstructural evolution and residual stresses that will influence the resulting mechanical properties. Friction stir welds produced from magnesium alloy hot rolled plates were studied. ...
Texture evolution in Nd:YAG-laser welds of AZ31 magnesium alloy hot rolled sheets and its influence on mechanical properties COMMIN, Loreleï; DUMONT, Myriam; ROTINAT, René; PIERRON, Fabrice; MASSE, Jean-Eric; BARRALLIER, Laurent (Elsevier, 2011)AZ31 hot rolled magnesium alloy presents a strong basal texture. Using laser beam welding (LBW) as a joining process induces high temperature gradients leading to major texture changes. EBSD was used to study the texture ...