| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spectroscopic Methods and Analysis for Nuclear Energy Related Materials
|
| Presentation Title |
Studying the use of x-ray line profile analysis in irradiated materials via atomistic simulations |
| Author(s) |
Chris Race, Melvyn Larranaga, Tamas Ungar, Philipp Frankel, Jake Larkin |
| On-Site Speaker (Planned) |
Chris Race |
| Abstract Scope |
The zirconium alloys used in nuclear fission reactors undergo irradiation-induced growth (IIG), an anisotropic shape change resulting in the lengthening of the fuel rods. This is a result of the formation of dislocation loops and so improved understanding of IIG requires quantification of loops in irradiated zirconium alloys. One approach is direct counting in a transmission electron microscope, but this is time consuming, resulting in poor statistics. An alternative is to infer loop content from peak shape changes in an x-ray line profile.
We employ atomistic computer models of populations of dislocation loops, together with line profiles calculated from those models, to probe the dependence of the line profile on details of the defects present. We uncover trends in the peak shape that correlate with features of the loop populations, offering a systematic way to improve and validate line profile analysis in the characterisation of irradiated material. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Modeling and Simulation, Characterization, Nuclear Materials |