NSUF 25-5316: In-situ dual beam irradiation of BCC-L21 and BCC-B2 alloys for void formation
Compositionally complex refractory superalloys are an area of significant promise as researchers seek materials that can withstand the higher temperatures and higher doses demanded by advanced nuclear reactor designs. However, radiation studies of these dual phase materials are quite limited. Recent work by the PI has shown that in a Al15Co4Cr20Mn20Ti6V35 BCC-L21 system, increased void formation occurs with increasing volume fraction of the L21 precipitates. This is counter to traditional thought, wherein the coherent interfaces are thought to act as recombination sites and enhance radiation tolerance. Here, we propose an in-situ dual beam irradiation TEM study of the above BCC-L21 ¬system, as well as a NbMo-RuTi model BCC-B2 system to identify the underlying mechanism that is driving the formation of voids with coherent precipitates. Helium implantation and Kr++ ion irradiation will be used to form voids in samples with and without the coherent precipitates to study the mechanism of nucleation and growth. Comparison between the two alloy systems will aide in identifying whether the mechanism is related to the interface characteristics or to the precipitate chemistry. Results will be crucial for the continued design of refractory superalloys for nuclear applications. This work is expected to take 4 days at the Intermediate Voltage Electron Microscope (IVEM) at Argonne National Laboratory, with sample preparation performed by the PI the University of Wisconsin – Madison.
Additional Info
| Field | Value |
|---|---|
| Awarded Institution | University of Wisconsin-Madison |
| DOI | 10.46936/NSUF/60015363 |
| Embargo End Date | 2027-09-03 |
| Facility Tech Lead | Wei-Ying Chen |
| Irradiation Facilities | Intermediate Voltage Electron Microscopy (IVEM)-Tandem Facility |
| NSUF Call | FY 2025 RTE 2nd Call |
| PI | Nick Crnkovich |
| PIE Facilities | Intermediate Voltage Electron Microscopy (IVEM)-Tandem Facility |
| Project Member | Dr. Wei-Ying Chen, Material Scientist - Argonne National Laboratory (https://orcid.org/0000-0002-6583-4204) |
| Project Member | Professor Adrien Couet, Assistant Professor - University of Wisconsin (https://orcid.org/0000-0002-7330-5150) |
| Project Member | Mr Nick Crnkovich, Research assistant - University of Wisconsin-Madison (https://orcid.org/0000-0002-5160-7289) |
| Project Type | RTE |