About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials, Processes and Applications for Energy Industry
|
| Presentation Title |
High-Temperature Irradiation Response of Al0.3Ti0.2Co0.7CrFeNi1.7 High Entropy Alloy processed via Directed Energy Deposition |
| Author(s) |
Mohan Sai Kiran Kumar Yadav Nartu, Subhashish Meher, Sudip Kumar Sarkar, Rajarshi Banerjee, Isabella Van Rooyen |
| On-Site Speaker (Planned) |
Mohan Sai Kiran Kumar Yadav Nartu |
| Abstract Scope |
One way to enhance sink strength or radiation resistance in alloys is by introducing multiple interfaces through secondary-phase-precipitation. HEAs hold significant potential for creating such microstructural heterogeneities. However, conventional processing route involving casting can be tedious and time-consuming. Advanced manufacturing methods, such as DED, provide an effective alternative to traditional approaches for producing heterogeneous microstructures. In this work, we present a nano-L12 precipitation-strengthened HEA(Al0.3Ti0.2Co0.7CrFeNi1.7), fabricated using DED, followed by a straightforward one-step annealing (heat treatment) that exploits residual stresses to successfully engineer heterogeneous-microstructures. We will discuss the evolution of these microstructures, and their performance under high-temperature(500°C) irradiation conditions. The L12-strengthened HEA exhibited nearly half the damage depth compared to similarly-processed IN 617, without any precipitate dissolution or void formation. Additionally, other microstructural evolutions due to in-situ spinodal decomposition will be presented. Overall, the Al0.3Ti0.2Co0.7CrFeNi1.7HEA demonstrates excellent radiation tolerance and opens avenues for further exploration of precipitation-strengthened HEAs for nuclear applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Nuclear Materials, Phase Transformations |