Local Chemical Order in High-Entropy Alloys

High-entropy alloys are designed based on the concept of multi-principle elements and high-configuration entropy. They exhibit excellent mechanical, high-temperature, and irradiation-tolerant properties, indicating their great potential for high-performance structural materials in the recent decade. Since the discovery of high-entropy alloys, most of the related research work was based on the classical assumption of ideal solid solution. However, recent investigation have showed the local chemical order in high-entropy alloys and how such atomic-level structure tunes the deformation mechanism, which has attracted significant attention. This study reviewed the recent progress in the theoretical description and experimental characterization of the local chemical order as well as its impact on the mechanical properties of high-entropy alloys. Besides, a brief perspective on the research of understanding and optimizing high-entropy alloys from the local chemical order is proposed.

Automated summary

High-entropy alloys are designed based on the concept of multi-principle elements and high-configuration entropy, exhibiting excellent mechanical, high-temperature, and irradiation-tolerant properties. Recent research has revealed the presence of local chemical order in high-entropy alloys and its impact on deformation mechanisms, attracting significant attention.