The paper proposes a numerical method for analyzing the complexes phenomena’s that appear in the case of keyholes welded pool geometry. Present model consist in a succession of analyses steps, needed to solve the interaction between the liquid/solid, liquid/protection gaze and liquid/MHD arc for arc welding for electrons impact and for electromagnetically waves.
The liquid/solid geometry result by dissipation the welding power source in a matrix of many point sources. This process gives a first approximation of temperature fields and a good approximation of the digit 3D position and information about the vaporization area. The interactions between phases simulate at micro scale with volume finite method.