SIMULATION OF SOLIDIFICATION AND GRAIN STRUCTURE IN POWDER-BED FUSION ADDITIVE MANUFACTURING

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  • Siemens Energy Global GmbH & Co. KG
  • University of Waterloo

Abstract

A method of simulating solidification of a build material (1) in a powder-bed-based additive manufacturing is presented. The method comprises applying a finite element model (FE) to calculate an initial thermal gradient (ΔT) and a melt pool (M) geometry in the build material (1), and applying a phase-field model (PF) being coupled to a modelling of a thermal gradient further evolving in the build material (1), wherein the phase field model (PF) simulates, (i), a structural grain formation (g) in the build material (1) out of a melt pool (M) created by a single track (T) irradiation and, (ii), re-melting of a structure (10) of the build material (1) created from a plurality of irradiation tracks (Tn). Moreover, a related computer program product (CP) and a related apparatus are presented.