NSUF 16-643: Effect of Neutron Irradiation on Tensile Deformation of a HT-UPS Stainless Steel
It is proposed to conduct microstructural characterization on a tensile-deformed, neutron-irradiated high-temperature ultrafine-precipitate-strengthened (HT-UPS) steel sample using the FIB sampling and TEM/APT analyzing capabilities at MaCS/CAES. The HT-UPS sample was neutron irradiated to 3dpa at 400°C in ATR, and was in-situ strained to fracture with simultaneous characterization using high energy X-ray scattering techniques at the APS, ANL. TEM and APT analysis of the deformed tensile specimen will provide complementary information to the in situ X-ray experiment to further understand the effect of neutron irradiation on deformation and failure mechanisms of the alloy. Location specific TEM lamella specimens representing different deformation stages including as-irradiated and undeformed state, uniform deformation state, and necking stage, will be prepared from each corresponding locations on the HT-UPS steel fractured tensile specimen. The as-irradiated microstructure and deformed microstructures will be characterized using the Tecnai TEM. The location-specific deformation structures, such as the dislocation densities, will be quantified and correlated with relevant X-ray diffraction analysis, to get a complete understanding of the deformation characteristics of this material. APT tips will be made from the as-irradiated and deformed regions to study the radiation- and deformation-induced elemental segregation and precipitation. This project is fully aligned with the DOE-NE’s missions via supporting the advanced reactor concepts (ARC), advanced small modular reactors (aSMR), and nuclear energy advanced modeling and simulations (NEAMS) programs. The proposed period of experiment is 3 days of FIB, 2 days of Tecnai TEM, and 4 days of LEAP. The research will be completed within six months after the proposal is approved.
Información adicional
| Campo | Valor |
|---|---|
| Awarded Institution | University of Florida |
| Embargo End Date | 2026-02-27 |
| Facility Tech Lead | Jason Hou, Mukesh Bachhav |
| NSUF Call | FY 2016 RTE 2nd Call |
| PI | Chi Xu |
| Project Member | Meimei Li - Argonne National Laboratory |
| Project Member | Yong Yang, Associate Professor - University of Florida (https://orcid.org/0000-0002-0247-6219) |
| Project Member | Dr Chi Xu, Assistant Professor - Beijing Normal University (https://orcid.org/0000-0001-9558-9097) |
| Project Type | RTE |
| Publication | In-situ high-energy X-ray characterization of neutron irradiated HT-UPS stainless steel under tensile deformation Chi Xu, Xuan Zhang, Yiren Chen, Meimei Li, Yong Yang Acta Materialia 156 2018-09-01 https://www.sciencedirect.com/science/article/pii/S1359645418305329 |
| RTE Number | 643 |