About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Tackling Structural Materials Challenges for Advanced Nuclear Reactors
|
Presentation Title |
Novel Refractory High Entropy Alloys for Applications in Extreme Environments |
Author(s) |
Osman El-Atwani, Saryu Fensin, Duc Nguyen, Jan Wrobel, Enrique Martinez |
On-Site Speaker (Planned) |
Osman El-Atwani |
Abstract Scope |
In the quest of new materials that can withstand severe irradiation and mechanical extremes for advanced applications (eg. fission reactors, fusion devices, space applications, etc.), design, prediction and control of advanced materials beyond current material designs become a paramount goal. W-based refractory high entropy alloys (HEAs) have been recently developed in the context of high temperature applications. Here, we present novel W-based refractory nanocrystalline and coarse grained HEAs and their performance to extreme environments. In-situ TEM thermal stability experiments, mechanical properties and irradiation resistance to single and dual beam irradiations are assessed. The results are elucidated based on theoretical modeling combining ab initio and Monte Carlo techniques. The simulation (CALPHAD, DFT and Cluster Expansion) guided HEAs demonstrated outstanding irradiation resistance and high thermal stability and mechanical properties, establishing a breakthrough in the design of new materials for extreme environments. |