Microstructure evolution of Inconel 625 alloy during single-track Laser Powder Bed Fusion

Elemental microsegregation and precipitate formation are inevitable during solidification of Additive Manufacturing (AM) parts. In this study, single-track Laser Powder Bed Fusion (LPBF) has been combined with optical and electron microscopy, as well as thermodynamic (CALPHAD) simulations, to evaluate the solidified microstructure and also the formation of the precipitates in an as-built LPBF microstructure of Inconel625 (IN625). It is shown …