Traditional melting sequences used in fusion-based additive manufacturing of high-temperature metals can produce material with spatially varying mechanical properties due geometry-sensitive variations in local solidification conditions. This technology introduces a discretized patch-wise melting strategy for electron beam powder bed fusion that improves consistency and control over the resulting material microstructure during fabrication. By dividing each layer of a build into smaller discretized regions and applying tailored process settings to each region, the approach enables the fabrication of materials with improved mechanical consistency and scalability for large parts. The method also allows manufacturers to influence material structure locally within complex geometries, supporting improved performance and reliability in additively manufactured metal components.
Description
Electron beam powder bed fusion is widely used to manufacture components from high-temperature alloys. However, conventional scanning strategies often process an entire cross-section using line-based melting patterns. These approaches can produce relatively slow cooling rates that encourage columnar grain formation, leading to reduced mechanical performance in certain build orientations. Furthermore, existing scan strategies are sensitive to geometric features such as component scale (long versus short line lengths) and sharp features (holes, corners, etc.).
This technology introduces a discretized patch-wise melting approach in which each layer of a part is divided into smaller regions, or patches, that are processed independently during fabrication. By assigning process conditions to each patch, manufacturers can influence local microstructure development within the build. Furthermore, for a fixed-area patch size, process settings can scale more readily to larger geometries since local conditions within the fixed-area patch remain similar. The strategy is conceptually similar to island-based processing approaches used in other additive manufacturing systems but is adapted for electron beam processes.
Instead of relying on predictive thermal models to determine optimal parameters, the method can employ empirically derived process-structure relationships developed through experimental data. These relationships connect selected process variables with resulting material characteristics, enabling consistent application during production.
Because the patches can be applied across arbitrarily large build areas, the strategy also reduces limitations associated with traditional scanning methods. In addition, the approach enables localized control of microstructure within complex geometries, allowing different regions of a component to be produced with targeted material characteristics.
Benefits
- Improved control of microstructure during additive manufacturing
- Reduced performance variability across build orientations
- Scalable processing strategy for large build areas
- Enables localized tailoring of material properties within components
Applications and Industries
- Additive manufacturing of high-temperature metal components
- Aerospace and defense manufacturing
- Industrial equipment and tooling production
- Advanced metal fabrication and materials engineering
Contact
To learn more about this technology, email [email protected] or call 865-574-1051.
Contact
To learn more about this technology, email [email protected] or call 865-574-1051.