| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
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| Symposium
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Progress towards Understanding the Synthesis and Behavior of Metals Far from Equilibrium: A SMD Symposium Honoring Enrique Lavernia on the Occasion of His 60th Birthday
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| Presentation Title |
Ultrafine-grained and Nanocrystalline Steels for Enhanced Mechanical Properties and Irradiation Resistance |
| Author(s) |
Haiming Wen, Andrew Hoffman, Jiaqi Duan, Maalavan Arivu |
| On-Site Speaker (Planned) |
Haiming Wen |
| Abstract Scope |
Steels have important applications in current and advanced nuclear reactors, however, their irradiation tolerance and mechanical properties need to be improved. Bulk ultrafine-grained (UFG) and nanocrystalline (NC) metals possess drastically higher strength than their conventional coarse-grained (CG) counterparts, and may have significantly enhanced irradiation tolerance. In this study, UFG and NC austenitic and ferritic-martenstic steels were manufactured by equal-channel angular pressing (ECAP) and high-pressure torsion (HPT). The microstructure and mechanical behavior of these steels were carefully studied. Their thermal stability was also investigated. Neutron irradiation is being performed to study irradiation behavior of the steels. Ion irradiation was also conducted to compared with the neutron irradiation. Results indicated that the UFG and NC steels possess significantly improved hardness/strength compared to their CG counterparts. All the UFG and NC steels are thermally stable at least up to 500 °C. UFG and NC steels possess enhanced irradiation resistance than their CG counterparts. |
| Proceedings Inclusion? |
Undecided |