Component Scale Modelling Link to Materials Development

Purpose and goal:

The purpose of the project has been to develop and verify simulation methodology that can predict and prevent build-induced defects in additive manufacturing with Laser-Powder Bed Fusion (the L-PBF) process. The goal of the project has been fulfilled and validated via experimental test campaigns analyzed through:

calculations on macro- meso - and micro level, -in-situ process monitoring during printing, -optical inspection and microstructure investigations of the printed parts. Expected results and effects:

Results from the investigated case studies in the project show great opportunities to minimize defects in L-PBF via a simulation-driven methodology when planning print jobs. The methodology will hopefully lead to a reduced risk of production interruptions and insufficient quality of the final product, as well as a reduced need for costly "trial-and-error" trials in the future.

This, in turn, is part of a cost-effective qualification and quality assurance of additively manufactured components for the project´s parties. Approach and implementation: The project has focused on the following case studies: 1) Ovalization - Macroscopic deformation - 316L Radial deformation of horizontal thin-walled cylindrical cross-sections.

2) Overheating - Microstructure defect - 316L Deviating microstructure locally in a component provoked by challenging geometry and process parameters. 3) Cracking - Macroscale - Modifierat H13 Parametrized geometric artifacts that provoke macroscopic cracks 4) Cracking - Microscale - 316L and H13 Micromechanical modeling and prediction of mechanical properties.