| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Composite Materials for Nuclear Applications
|
| Presentation Title |
Irradiation Induced Forced Chemical Mixing and Local Hardening in Mechanically-processed Immiscible Zr/Nb Multilayers |
| Author(s) |
Madhavan Radhakrishnan, Thomas Nizolek, Daniel Savage, Marko Knezevic, Nan Li, Yongqiang Wang, Mukesh Bachhav, Boopathy Kombaiah, Nathan Mara, Osman Anderoglu |
| On-Site Speaker (Planned) |
Madhavan Radhakrishnan |
| Abstract Scope |
Past studies have shown that PVD-processed multilayers provide enhanced radiation damage mitigation due to interfaces-driven defects absorption. This work investigates the radiation resistance of bulk nanolayered zirconium-niobium composites subjected to high irradiation doses. Three Zr/Nb multilayers with individual layer thickness of 15-80nm were synthesized by accumulative-roll-bonding process. The multilayers were subjected to a dose of 82 dpa at 500°C using 7MeV Zr2+ ion beam. Cross-sectional TEM examination indicates that, in all multilayers, ion-irradiation has induced heterogeneous fragmentation of Zr, Nb layers and a chemically homogeneous mixed layer beneath the irradiated surface. The extent of sub-surface microstructural changes in multilayers agrees with the calculated damage profile. Light ion irradiation up to 1 dpa with He2+ ions was done to quantify the radiation defects-induced hardening in multilayers. The talk would focus on the correlation irradiation-induced local microstructural and compositional changes, and hardening response in layered structures using APT and micro-pillar compression tests. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Composites, Nuclear Materials |