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Scientific exploration in the field of high entropy alloys, known as HEAs, has recently exploded. First reported in about 2004, HEAs were defined originally as a blend of five or more elements with concentrations between 5 to 35 atom percent, and with a strong preference towards single-phase, solid solution metallic alloys. Later, the field branched to include intermetallic and ceramic compounds, alloys with as few as three principle elements, and microstructures with any number and type of phases. Today, researchers face vast combinations of elements with which to work, and they eagerly seek to learn more about HEA compositions, microstructures, promising property combinations, and opportunities for a wide variety of applications in both structural and functional materials. HEA development offers tremendous potential not only for expanding scientific knowledge, but also for creating a broad range of revolutionary products for strategic, economic, and national security benefits.
TMS is leading a 2021 science and technology accelerator study that centers on a 15-month effort to identify priority areas within this exciting area of research. “Defining Pathways for Realizing the Revolutionary Potential of High Entropy Alloys” is funded by the Defense Advanced Research Projects Agency (DARPA) via the Air Force Research Laboratory (AFRL). The study examines the extensive work being performed in this emerging field with the goal of providing science and technology pathways to accelerate realization of the wide-reaching potential of HEAs in some key application areas and alloy categories.
The final report will be released at the 2nd World Congress on High Entropy Alloys, scheduled for December 5–8, 2021. To receive important information about the study and a notification when the free report is available, please complete this form to sign up for updates.
- Scope and prioritize the application (and alloy) domains of most promise for HEAs for defense-related applications.
- For the identified high priority areas, perform a deep dive to identify in depth the key gaps, barriers, needs, and enablers of the next stage of HEA research in these specific domains.
- Provide concrete recommendations on key milestones and implementation pathways critical to setting the stage for ultimately transitioning HEAs in these focus areas from fundamental concepts and laboratory-scale samples to materials and parts manufactured at scale.