Exceptional enhancement of mechanical properties in high-entropy alloys via thermodynamically guided local chemical ordering.

ABSTRACT: Understanding the local chemical ordering propensity in random solid solutions, and tailoring its strength, can guide the design and discovery of complex, paradigm-shifting multicomponent alloys. First, we present a simple thermodynamic framework, based solely on binary enthalpies of mixing, to select optimal alloying elements to control the nature and extent of chemical ordering in high-entropy alloys (HEAs). Next, we couple high-resolution electron microscopy, atom probe tomography, hybrid Monte-Carlo, special quasirandom structures, and density functional theory calculations to demonstrate how controlled additions of Al and Ti and subsequent annealing drive chemical ordering in nearly random equiatomic face-centered cubic CoFeNi solid solution. We establish that short-range ordered doma

SUBMITTER: Dasari S 

PROVIDER: S-EPMC10265979 | biostudies-literature | 2023 Jun

REPOSITORIES: biostudies-literature