A multi-component and multi-phase-field modelling approach, combined with transformation
kinetics modelling, was used to model microstructure evolution during laser metal powder
directed energy deposition of Alloy 718 and subsequent heat treatments. Experimental
temperature measurements were utilised to predict microstructural evolution during
successive addition of layers. Segregation of alloying elements as well as formation of
Laves and δ phase was specifically modelled. The predicted elemental concentrations were …