EUROPEAN CONGRESS AND EXHIBITION ON ADVANCED MATERIALS AND PROCESSES - EUROMAT 2021

A key advantage of additive manufacturing is that it provides a means for producing parts with complex shapes unavailable for other solidification techniques. Another advantage of the method is that the very high cooling rates in the melt pool can result in solids with very fine microstructure and therefore improved mechanical properties. The subject of this presentation is our phase-field study of the solidification of a model eutectic system under conditions resembling the laser-additive manufacturing of a Fe-Fe2Ti eutectic alloy. Using a cyclic temperature programme we could reproduce the layered microstructure observed in the experiments, where each repetitive layer builds up starting from a thin globular layer which then transforms to a thicker layer with an ultrafine lamellar structure.