| About this Abstract |
| Meeting |
2024 TMS Annual Meeting & Exhibition
|
| Symposium
|
Materials and Chemistry for Molten Salt Systems
|
| Presentation Title |
Microstructural and Hardness Changes of Ion-irradiated Novel Ni-base Alloys for Molten Salt Reactor Applications |
| Author(s) |
Ryan Thier, Jaimie Tiley, Bruce Pint, Ryan Gordon, Kumar Sridharan, Soumya Nag, Steven Zinkle |
| On-Site Speaker (Planned) |
Ryan Thier |
| Abstract Scope |
Though a material of interest for molten salt reactors, Hastelloy® N’s limited strength above 650°C creates a need for higher-creep-strength nickel alloys with adequate corrosion resistance and radiation stability. Consequently, four novel alloys have been designed using computational thermodynamics to satisfy these requirements by exploiting different strengthening mechanisms including solid-solution, carbide, and intermetallic precipitate strengthening. 50-pound heats of each alloy were fabricated at an industrial supplier. Mechanical testing and microstructural characterization were performed. Ion-irradiation with 8 MeV Ni+ ions was conducted at temperatures of 600 and 750°C to 1 and 10 DPA; strength changes were assessed using Nix-Gao fitting of nanoindentation hardness measurements, with AFM pileup correction. Microstructural changes in size and number density of second phases and dislocations were examined with TEM techniques in the safe analysis region. The radiation resistance of the alloys will be discussed and the best candidate(s) for further development will be identified. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Characterization, Other |