| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Seaborg Institutes: Emerging Topics in Actinide Sciences
|
| Presentation Title |
Changes in stiffness and internal friction of delta-PuGa due to aging and annealing |
| Author(s) |
Boris Maiorov |
| On-Site Speaker (Planned) |
Boris Maiorov |
| Abstract Scope |
The effects and mechanisms behind 239-Pu self-irradiation in delta-PuGa have been studied for many years. Elastic moduli and internal friction changes point to thermodynamic and defect related changes occurring from self-irradiation.
Resonant Ultrasound Spectroscopy (RUS) measures the mechanical resonances to extract elastic moduli and determine internal friction.
Using RUS, we perform time- and temperature-dependent measurements of the mechanical resonances of delta-PuGa. We track the changes of the elastic moduli and internal friction in time and temperature. We show how the rate of change in moduli is material- and age-dependent and how it behaves after it is reset during annealing. Similarly, changes in internal friction with time indicate the complexity of the self-irradiation process and point unequivocally to the onset of annealing processes. By comparing results in elastic moduli and internal friction for different samples we can distinguish intrinsic and extrinsic changes as well as obtain estimates of overall changes. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Phase Transformations, |