|About this Abstract
||MS&T22: Materials Science & Technology
||High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond III
||Effect of Short-range Ordering on Diffusion Properties in Complex Concentrated Alloys
||Anus Manzoor, Yongfeng Zhang
|On-Site Speaker (Planned)
Diffusion properties are in general important for kinetic processes in complex concentrated alloys (CCAs). In CCAs, short-range ordering (SRO) may exist particularly at lower temperatures which is caused by the mixing of different constituent elements. Short-range ordering can significantly affect diffusion properties in CCAs and thus, it is critical to understand the impact of SRO on defect mediated diffusion. In this work, using atomistic calculations, we have shown that the diffusion can be localized in the SRO state of a given alloy. By elucidating the role of vacancy formation and migration energy, we have shown that the localization of diffusion is mainly controlled by the vacancy formation energy. Furthermore, the SRO can impact probability distribution of the vacancy formation energy and which ultimately affects equilibrium concentration of vacancies.