Numerical Simulation of Electron Beam Welding and Instrumental Technique
Keywords:
electron beam welding, temperature measurement, metallurgy, transformation kinetics, thermal modelling, keyhole, recoil pressureAbstract
In the present work, thermal cycles measured with thermocouples embedded in specimens are employed to validate a numerical thermometallurgical model of an Electron Beam welding process. The implemented instrumentation techniques aim at reducing the perturbations induced by the sensors in place. The numerical model is based on the definition of a heat source term linked to the keyhole geometry predicted by a model of pressure balance using the FEMLAB code. The heat source term is used by the thermometallurigal simulation carried out with the finite element code SYSWELD. Kinetics parameters are extracted from dilatometric experiments achieved in welding austenitization conditions at constant cooling rates.
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