Scientific Achievement
Design of order-disorder transformations in high-entropy ferritic (Ti-Cr-Fe-Ni-Al) steels by a novel electron-based theory that identifies electronic origins for chemical ordering and how to control it.
Significance and Impact
Tuning the degree of short-range order in ferritic steels optimizes phase selection and mechanical properties in technological-useful structural alloys.
Research Details
- Electronic-structure based linear-response theory integrated with configurational averaging predicts ordering for complex solid-solution alloy, including ferritic steels.
- Predictions for control (e.g., %Ti) agree with known and recent experiments.
Prashant Singh & Duane D. Johnson, “Designing order-disorder transformation in high-entropy ferritic steels,” Journal of Materials Research (2021). Invited by JMR Editors – Early Career Scholars in Materials Science 2022