| Abstract Scope |
High-entropy alloys (HEAs) combine complex chemistries with even more complex phase transformation behaviors, especially during non-equilibrium processing. This talk highlights how synchrotron-based X-ray diffraction, particularly in-situ and high-speed techniques, provides direct insight into structural evolution during both solid-state aging and rapid solidification. These measurements capture transformation sequences, elemental partitioning, and transient phases that are invisible to conventional post-mortem analysis. When applied to additive manufacturing, these advanced measurements reveal how kinetic effects, such as those driven by rapid cooling, melt pool dynamics, and alloying, govern microstructure development far from equilibrium. By bridging the liquid-to-solid transition with downstream aging processes, the diffraction-based methods clarify how phases form, interact, and compete, revealing specific pathways to control microstructure through processing. These insights aren’t just scientifically interesting. They are also essential for advancing the design and deployment of compositionally complex HEAs for structural and functional applications. |