Abstract Scope |
High entropy alloys (HEAs) are alloys with five or more principal elements that have a concentration between 5 and 35 at.% with other minor (< 5At%) elements. HEAs have random liquid or random solid solution states that have significantly higher mixing entropies than those in conventional alloys. Because there are multiple principal element comprising these alloys, HEAs can possess special properties which may include high strength/hardness, outstanding wear resistance, exceptional high-temperature strength, good structural stability, and/or good corrosion and oxidation resistance.
HEAs cover a huge compositional space, thus, comprehensive, multidisciplinary, high throughput computational, experimental and characterization approaches are needed. The goal is to create multi-variable physics- and chemical-based models and tools to establish the fundamental science base for these alloys. Our existing understanding of physical metallurgy, mechanics, passivity, phase stability, and heat treatments will face a challenge in our pursuit of interpreting the structure-processing-property relationships of such multi-element alloys. |