Extensions of the numerical welding simulation for the examination of metal science questions

The examination of metal science questions in fusion welding using the nume rical simulation is only successful, if the capabilities of commercial fini te element programs are extended. Besides special modeling strategies new a pproaches for the consideration of the convective energy transport in the w eld pool and the occurring microstructural changes are needed, which are in dividually fitted to the considered welding procedure and material. The lar gest difficulty lies in the missing mechanical material properties which ar e the basis for a successful numerical simulation The presented work shows approaches for the solution for a variety of these problems.