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 |
|---|---|
| Abstract | 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. |
| Award Announced Date | 2020-02-05T14:15:29.277 |
| Awarded Institution | Idaho National Laboratory |
| Facility | Advanced Test Reactor |
| Facility Tech Lead | Alina Zackrone |
| Irradiation Facility | None |
| PI | Weiyue Zhou |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 3028 |