| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials for Nuclear Applications
|
| Presentation Title |
Enhanced Microstructural Stability of ARB-processed Cu/Nb Nanolayers Under Heavy Dose Ion Irradiation at Elevated Temperatures |
| Author(s) |
Madhavan Radhakrishnan, Thomas Nizolek, Mukesh Bachhav, Yongqiang Wang, Nathan Mara, Osman Anderoglu |
| On-Site Speaker (Planned) |
Madhavan Radhakrishnan |
| Abstract Scope |
Next generation nuclear reactors demand novel structural alloys capable to withstand high irradiation doses and harsh service conditions. In this work, bulk Cu/Nb nanolayered composites, produced by accumulative roll bonding process, were used as a model material to understand the synergistic effects of heavy irradiation doses and elevated temperatures on the stability of immiscible metallic interfaces and layered microstructures. Cu/Nb multilayers with an individual layer thickness of 25-500 nm were irradiated to a high dose of 200 dpa at 400°C and 600°C using Cu2+ ions with energies up to 7 MeV. Sub-surface microstructure examination revealed remarkable stability of Cu/Nb interface structures under irradiation and did not show any sign of morphological perturbation. Neither voids nor local chemical mixing across the interfaces were evident. The talk explores the correlation between the observed irradiation resistance and the defect sink efficiency of Cu/Nb interfaces using high-resolution electron microscopy and atom probe tomography. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Composites, Nuclear Materials |