NSUF 20-3028: In-situ Micro-tensile Testing for Measuring Grain Boundary Strength of NiCr Alloys under Simultaneous Irradiation and Corrosion Environments
The development of a quantitative relationship between microchemistry and strength of individual grain boundary (GB) has been rarely achieved. The technical objective of this RTE is to measure the GB strength of well-characterized GBs in Ni-Cr alloys under pure molten salt corrosion and under proton irradiation/corrosion using Hysitron PI-88 PicoIndenter at Idaho National Laboratory. After experiencing corrosion and simultaneous irradiation/corrosion, the microchemistry of GBs in Ni-Cr is altered, which eventually leads to microstructure change. If following the depth of one GB, there will be microstructure change such as voids formation and salt penetration at the beginning and gradual microchemistry change ahead of it. Therefore, on one grain boundary, one can perform micro-tensile testing across the GB at different depth. The relationship between microchemistry/microstructure and grain boundary strength will be built upon the data.
Additional Info
| Field | Value |
|---|---|
| Awarded Institution | Massachusetts Institute of Technology |
| Embargo End Date | 2024-05-09 |
| Facility Tech Lead | Alina Montrose |
| NSUF Call | FY 2020 RTE 1st Call |
| PI | Weiyue Zhou |
| PIE Facilities | Irradiated Materials Characterization Laboratory |
| Project Member | Dr. Lingfeng He, Associate Professor - North Carolina State University (https://orcid.org/0000-0003-2763-1462) |
| Project Member | Daniel Murray, instrument scientist - Idaho National Laboratory |
| Project Member | Dr. Weiyue Zhou, Research Scientist - Massachusetts Institute of Technology (https://orcid.org/0000-0002-8567-0999) |
| Project Member | Dr. Yachun Wang, Postdoc Research Associate - Idaho National Laboratory (https://orcid.org/0000-0002-4952-3633) |
| Project Notes | Awarded on 02/05/2020 |
| Project Type | RTE |
| Publication | Synergistic Effects of Molten Salt Corrosion and Proton Irradiation on Grain Boundary Strength in Ni-20Cr Weiyue Zhou Materials & Design 258 2025-08-12 None |
| RTE Number | 3028 |