| Abstract Scope |
Recent research on high entropy alloys (HEAs), also known more generally as complex concentrated alloys, has revealed their ability to significantly expand the alloy design space, offering new opportunities for critical structural applications, particularly under extreme environments. In this talk, compositional and microstructural based HEA design approaches for enhanced mechanical properties will be discussed. The mechanical properties and deformation mechanisms of face-centered-cubic (FCC) FeCoNiAl-based HEAs with heterogeneous microstructure under various mechanical testing conditions will be presented. Additionally, using in situ mechanical testing, the small-scale and crystal orientation-dependent mechanical behavior of single-crystalline HEAs was investigated. Furthermore, the mechanical behavior of a strong-and-ductile refractory body-centered-cubic (BCC) HEAs was examined across a wide temperature range. The deformation mechanism and processing-microstructure-property relationship revealed in this system provide insights for the development of materials for extreme environments. |