| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components IV
|
| Presentation Title |
Effect of processing on the nanomechanical properties of 14YWT ODS steels |
| Author(s) |
Kevin Jacob, Sid Pathak, Jordan Tiarks, Nicolas Argibay, Iver Anderson, Hyosim Kim, Stuart Maloy |
| On-Site Speaker (Planned) |
Kevin Jacob |
| Abstract Scope |
Microstructural analyses along with micropillar compression, spherical and Berkovich nanoindentation were conducted on 14YWT nanostructured ferritic alloy (NFA) to compare different processing pathways: hydrostatic extrusion and Pilger processing with varying annealing temperatures into thin walled tubing. Processing at temperatures below 815 oC resulted in a bimodal microstructure with larger recrystallized grains occurring along specific bands surrounded by nanocrystalline grains. Higher annealing temperatures of 1200 °C after pilger processing increased the grain size with a stronger <111> crystallographic texture. Nanomechanical responses were quantified both as a function of grain orientation and size. The microstructural heterogeneity and respective strength contributions were also separated out through the indentation technique. The indentation yield strength was highest (2.7 GPa) for the samples annealed at 1200 oC. Characterization of samples annealed at temperatures of 1200 oC through TEM indicated the formation of numerous nano-oxide precipitates, possibly leading to an overall increase in strength at these temperatures. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Mechanical Properties, Nuclear Materials, Characterization |