Tailoring High Entropy Alloys—From Nearest Neighbor to Bulk Processing

High entropy alloys are promising for candidates for a wide variety of applications, from aerospace to medicine. One tuning knob that HEAs possess is the short range order. Designing alloys for short range order can be done but measuring order is time consuming and difficult. Here we describe a data-driven, high throughput approach to alloy synthesis, characterization, and scale up with short range order as a design element. We reveal that order can be tracked in hundreds of alloys in real time, on the fly, using ML tools for semi-autonomous experimentation. Notably, the presence of short range has been connected to metastable phase evolution and non-equilibrium structures. These findings provide a pathway for tailoring high entropy alloys through these novel microstructural evolution pathways. To that end, highlights from scaling these alloys via bulk processing will be discussed.