|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Refractory High Entropy Alloys for Applications in Extreme Environments
||Osman El-Atwani, Hi Vo, Matheus Tunes, Andrew Alvarado, Kevin Baldwin, Koray Iroc, Eda Aydogan, Stuart Maloy, Enrique Martinez
|On-Site Speaker (Planned)
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 (HEA) have been recently developed in the context of high temperature applications. Here, we present thermal stability, mechanical properties and irradiation resistance experiments on several simulation (CALPHAD, DFT and Cluster Expansion) guided compositions of W-based refractory HEAs. In-situ TEM-annealing experiments are performed on different compositions of the HEAs and the results are compared with CALPHAD simulations and the enthalpies of mixing determined through DFT and Cluster Expansion methodologies. Ductility and strength are assessed, and in-situ TEM-irradiation and implantation experiments are performed and discussed. This work constructs a timely and urgent pathway to optimize the properties of these HEAs for different current and future applications.
||High-Entropy Alloys, Nuclear Materials, High-Temperature Materials