NSUF 18-1520: Investigation of the Tensile-Deformed Microstructure of a Neutron-Irradiated Type 316 Stainless Steel Specimen
TEM investigation will be performed on a tensile-deformed Type 316 stainless steel (ss) specimen irradiated in the BOR-60 reactor to 11.8 dpa at 315 C. The tensile test was conducted at room temperature with in-situ high-energy x-ray diffraction measurements, which revealed the progression of a "deformation wave" accompanied by martensitic phase transformation. TEM samples from different regions of interest will be prepared by the focused ion beam (FIB) lift-out method, including the deformed region (away from necking center), the undeformed region, the transition region, and the necking center. The TEM investigation will focus on irradiation defects and their role in plasticity. The mechanism of martensitic transformation and the role of other microstructural features (such as precipitates, twins, etc.) will also be evaluated. The TEM results will be used in combination with in-situ x-ray diffraction results to gain a complete understanding of the complex deformation behavior in this neutron-irradiated specimen, providing insights to irradiation hardening and embrittlement mechanisms.
Additional Info
| Field | Value |
|---|---|
| Abstract | TEM investigation will be performed on a tensile-deformed Type 316 stainless steel (ss) specimen irradiated in the BOR-60 reactor to 11.8 dpa at 315 C. The tensile test was conducted at room temperature with in-situ high-energy x-ray diffraction measurements, which revealed the progression of a "deformation wave" accompanied by martensitic phase transformation. TEM samples from different regions of interest will be prepared by the focused ion beam (FIB) lift-out method, including the deformed region (away from necking center), the undeformed region, the transition region, and the necking center. The TEM investigation will focus on irradiation defects and their role in plasticity. The mechanism of martensitic transformation and the role of other microstructural features (such as precipitates, twins, etc.) will also be evaluated. The TEM results will be used in combination with in-situ x-ray diffraction results to gain a complete understanding of the complex deformation behavior in this neutron-irradiated specimen, providing insights to irradiation hardening and embrittlement mechanisms. |
| Award Announced Date | 2019-03-27T00:00:00 |
| Awarded Institution | None |
| Facility | None |
| Facility Tech Lead | Yaqiao Wu |
| Irradiation Facility | None |
| PI | Xuan Zhang |
| PI Email | [email protected] |
| Project Type | RTE |
| RTE Number | 1520 |