Computational Analysis of Solute-Element Segregation in Ni-Based Superalloy Fabricated by Powder-Bed Fusion

Abstract

 Solute segregation significantly af fects material properties and is an essential issue in powder-bed fusion （PBF） type additive manufacturing of Ni-based superalloys. This paper introduces the computational studies of solute segregations in the Hastelloy-X Ni-based superalloy under the PBF process predicted by the multi-phase field and Scheil-Gulliver models. These studies suggest that significant solute segregation occurs under rapid cooling conditions and increases the liquation crack susceptibility.