| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Phase Transformations and Microstructural Evolution
|
| Presentation Title |
Time Resolved In-situ Small Angle X-ray Scattering Clarifies the Competition between Continuous and Discontinuous Precipitation in U-6wt%Nb |
| Author(s) |
Nathan E. Peterson, Erik Watkins, Don Brown, Bjorn Clausen, Travis Carver, Jun-Sang Park, Sean Agnew |
| On-Site Speaker (Planned) |
Nathan E. Peterson |
| Abstract Scope |
During the initial stages of the monotectoid phase transformation in U-6wt%Nb, both continuous (intragranular) and discontinuous (lamellar, grain boundary) precipitation occur, in a competitive fashion. In order to better understand the competition between these two modes, in-situ small-angle x-ray scattering (SAXS) measurements were performed to probe the relevant (10-150nm) precipitate length scales. Simultaneous wide-angle x-ray scattering (WAXS, diffraction) measurements were also performed, which provided quantitative phase volume fractions and compositions (critical for quantifying scattering contrast). These experiments reveal two distinct microstructural length scales which correspond to the two modes of precipitation, providing greater clarity regarding the temporal competition between these two modes at various temperatures above and below the nose in the TTT diagram. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Phase Transformations, Nuclear Materials, Characterization |