التفاصيل البيبلوغرافية
| العنوان: |
Versatility of dislocation motions in polycrystalline UO2 deformed at 1550 °C investigated by TEM. |
| المؤلفون: |
Onofri, C.1 (AUTHOR) claire.onofri@cea.fr, Monchoux, J.P.2 (AUTHOR), Amodeo, J.3 (AUTHOR), Madec, R.4,5 (AUTHOR), Sabathier, C.1 (AUTHOR), Palancher, H.1 (AUTHOR), Fouet, J.1 (AUTHOR), Drouan, D.1 (AUTHOR), Legros, M.2 (AUTHOR) |
| المصدر: |
Scripta Materialia. Apr2024, Vol. 244, pN.PAG-N.PAG. 1p. |
| مصطلحات موضوعية: |
*URANINITE, *TRANSMISSION electron microscopy, *STRAIN rate, *NUCLEAR fuels, *VISCOPLASTICITY, *URANIUM |
| مستخلص: |
The present study explores the behavior of dislocations in uranium dioxide (UO 2) under mechanical loading at high-temperature. Transmission electron microscopy characterization was carried out on polycrystalline UO 2 pellets after uniaxial compression tests performed at constant strain rate and 1550 °C. The detailed characterization of dislocation motion provides insights on the deformation processes operating at the nanoscale that are critical to better understand the viscoplastic response of the UO 2 nuclear fuel during off-normal power transient. Results emphasize the complexity of dislocation motion at high temperature since it involves glide and a mixed mechanism involving climb, called mixed climb, which was not evidenced earlier in this material. [Display omitted] [ABSTRACT FROM AUTHOR] |
| قاعدة البيانات: |
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