Author(s)

A. Mahrle & J. Schmidt

Abstract

A three-dimensional model for the simulation of the temperature distribution during deep penetration laser beam welding of thin sheets is presented. The convective heat transfer in the molten zone is taken into account based on a numerical solution of the conservation equations of momentum, mass and energy. For the steady state, the computation is carried out using a finite difference scheme on staggered grids. 1 Introduction The temperature distribution during welding is important since it accounts for the evaluation of the microstructure, residual stresses and distortion. The measurement of the thermal cycle is difficult because of the high tem- perature range and the existence of a multi- phase system. A remedy is the use of mathematical models. If success in simulation of the temperature has been achieved, essential advantages can be taken of it for further process development and quality a

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