About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
Tackling Structural Materials Challenges for Advanced Nuclear Reactors
|
Presentation Title |
Microstructural Response of HT-UPS Steel to Thermal Annealing and Neutron Irradiation |
Author(s) |
Maria A. Okuniewski |
On-Site Speaker (Planned) |
Maria A. Okuniewski |
Abstract Scope |
High temperature – ultrafine precipitate strengthened (HT-UPS) steel is an advanced austenitic steel with micro- and nano-sized precipitates designed to serve as sinks for irradiation-induced defects. This study uniquely investigates the microstructural response of HT-UPS to both thermal annealing and low fluence neutron irradiations before and after the stimulus is applied. Three-dimensional evolution of the grain and precipitate morphologies are studied as a function of dose and annealing time using synchrotron high-energy diffraction microscopy and micro-computed tomography. Whereas the crystallography and chemistry of the precipitate and matrix phases are characterized via synchrotron X-ray diffraction and X-ray absorption spectroscopy. |