About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Nanostructured Materials in Extreme Environments
|
Presentation Title |
Irradiation Response of Nanostructured HEAs |
Author(s) |
Matthew J. Luebbe, Haiming Wen, Khalid Hattar |
On-Site Speaker (Planned) |
Matthew J. Luebbe |
Abstract Scope |
High entropy alloys (HEAs) are a new class of materials with great potential for nuclear applications owing to their unique radiation resistance and phase stability at room temperature and elevated temperatures. Due to Co long-term activation concerns, HEAs without Co must be developed, and nano structuring in the form of precipitates or reduced grain size can improve their already excellent radiation resistance properties. Two HEAs, a single-phase FeNiMnCr10 alloy and a precipitation hardened (FeNiMnCr10)88Ti4Al8 alloy, were fabricated and processed to produce nanograins and nanoprecipitates, respectively. Both alloys were ion irradiated at room temperature, 500 oC, and 700 oC, with evolution of radiation defects observed in-situ in a transmission electron microscope. At room temperature, only dislocations and dislocation loops were observed in both. At elevated temperatures, FeNiMnCr10 showed void formation, while (FeNiMnCr10)88Ti4Al8 exhibited irradiation-induced precipitation of additional intermetallic phases. |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Characterization, |