| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
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| Symposium
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Advanced Characterization of Materials for Nuclear, Radiation, and Extreme Environments V
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| Presentation Title |
Interactions Between Radiation-Induced Defects and Shock in Al 1100 |
| Author(s) |
Calvin R. Lear, David Robert Jones, Daniel Tito Martinez, Matthew Ryan Chancey, Yongqiang Wang, Nan Li, Saryu Jindal Fensin |
| On-Site Speaker (Planned) |
Calvin R. Lear |
| Abstract Scope |
Interactions between radiation-induced defects (helium bubbles, dislocation loops, and voids) and dynamic deformation processes are little understood and are concerning for long-term, low-temperature irradiation. Recent work on irradiated copper, for example, has revealed the unexpected collapse of helium bubbles on contact with shockwaves, increasing the production of ejecta and erasing strengthening observed under quasi-static nanomechanical testing. Here, room temperature irradiations with helium and silicon ions were performed on control samples and on targets for shock testing with recovery, to directly observe the effects of defects-on-shock and of shock-on-defects in Al 1100. Combinations of irradiating ion were used for three conditions: “He” with bubbles (2-5 nm, diameter), “Si” with dislocation loops (10-20 nm) and voids (50-200 nm), and “Si-He” with the features of both. These defect microstructures were probed using transmission electron microscopy and nanopillar compression. Comparisons of shock behavior and of defect microstructures and discussed in terms of long-term performance. |