Abstract
The description of solute redistribution during welding processes is difficult due to a strong coupling between fluid flow, temperature field and macrosegregations. In this work a new stable algorithm for the calculation of melting and solidification in eutectic and peritectic binary alloys under extreme thermal conditions is presented. It uses piecewise linear eutectic and peritectic phase diagrams. It was applied to the simulation of thermal Marangoni convection and a transient line wel ding process. In both cases the development of the weld pool shape, the flow field and the carbon redistribution is predicted.
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