| Abstract Scope |
Controlling the morphology and distribution of precipitates is crucial for optimising mechanical properties in precipitation strengthened alloys. This study examines how various processing methods, including laser powder bed fusion (LPBF) and thermomechanical treatments, can be strategically designed to control precipitate formation pathways in Alloy 718. By systematically altering process parameters, distinct precipitate configurations emerge, reflecting variations in local thermal and mechanical histories. High resolution three dimensional characterisation enabled detailed evaluation of nanoscale precipitates, revealing differences in their size, distribution, and spatial arrangements, which significantly influence the alloy’s mechanical properties. A multiscale characterisation approach identifies key microstructural features and correlates these with processing history. This research demonstrates that deliberate process control can effectively guide precipitate evolution and enhance alloy performance without altering chemical composition. Such an approach provides fundamental insights into processing, microstructure formation, and mechanical behaviour relationships in structural alloys. |