NSUF 20-4096: Micro-mechanical characterization of proton induced long range ordering in Ni-Cr model alloy
Micro pillar compression will be performed on proton irradiated Ni-33at%Cr model alloy specimen to clarify the effect of irradiation induced long range ordering (LRO) phase transformation on deformation behavior. Samples are irradiated with 2MeV proton at 300˚C to 1.5 and 6 dpa at a dose rate of 10-5 dpa/sec. All samples are ready for testing and will be performed the second half of 2020. If the study is successful, the result will be compared with previous data, which comes from thermal induced LRO and as-received samples to be an independent publication. Previous result has shown that deformation mode in as-received sample is pure slipping, while that of thermal aged sample with LRO is slipping + deformation twinning. Therefore, it is expected that the proton irradiated samples will deform in slipping + twinning mode. However, due to the existing of radiation induced damage, the deformation behavior may be different. The result will be compared with previous data qualitatively, by videos, and quantitatively, by stress-strain plots. We believe that a thorough micro mechanical analysis on pillars will provide us with detailed information on irradiation effects in Ni-Cr binary model alloys, which will be the guidance for commercial alloys such as alloys 690 and 625. Additionally, considering the wide existing of LRO in other alloy systems, such as Cu-Co, Ni-Al, etc., the result of this experiment will be a good reference for extending the research of deformation mode to other LRO systems in future.
Additional Info
| Field | Value |
|---|---|
| Abstract | Micro pillar compression will be performed on proton irradiated Ni-33at%Cr model alloy specimen to clarify the effect of irradiation induced long range ordering (LRO) phase transformation on deformation behavior. Samples are irradiated with 2MeV proton at 300˚C to 1.5 and 6 dpa at a dose rate of 10-5 dpa/sec. All samples are ready for testing and will be performed the second half of 2020. If the study is successful, the result will be compared with previous data, which comes from thermal induced LRO and as-received samples to be an independent publication. Previous result has shown that deformation mode in as-received sample is pure slipping, while that of thermal aged sample with LRO is slipping + deformation twinning. Therefore, it is expected that the proton irradiated samples will deform in slipping + twinning mode. However, due to the existing of radiation induced damage, the deformation behavior may be different. The result will be compared with previous data qualitatively, by videos, and quantitatively, by stress-strain plots. We believe that a thorough micro mechanical analysis on pillars will provide us with detailed information on irradiation effects in Ni-Cr binary model alloys, which will be the guidance for commercial alloys such as alloys 690 and 625. Additionally, considering the wide existing of LRO in other alloy systems, such as Cu-Co, Ni-Al, etc., the result of this experiment will be a good reference for extending the research of deformation mode to other LRO systems in future. |
| Award Announced Date | 2020-07-14T14:04:22.83 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Peter Hosemann |
| Irradiation Facility | None |
| PI | Fei Teng |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 4096 |