| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Mechanical Behavior of Nuclear Reactor Materials and Components IV
|
| Presentation Title |
Neutron Irradiation-Induced Pseudoelasticity in 316L Austenitic Stainless Steel |
| Author(s) |
Arya Chatterjee, Soumita Mondal, Yu Lu, Donna P. Guillen, Benjamin Sutton, David W. Gandy, Janelle P. Wharry |
| On-Site Speaker (Planned) |
Arya Chatterjee |
| Abstract Scope |
The objective of this work is to demonstrate the novel effect of neutron irradiation-induced pseudoelastic behavior in austenitic stainless steels (SS). Two 316L stainless steels, made using conventional wrought process and powder metallurgy hot-isostatic-pressing (PM-HIP) technique, were subjected to neutron irradiation up to 3 displacements per atom (dpa) at 400 ℃. Post-irradiation microstructural characterization revealed dislocation loops and voids as the primary form of irradiation-induced defects. Irradiated specimens are further subjected to deformation using nanoindentation. Nanoindentation data exhibited a pseudoelastic nature of load-displacement curve for PM-HIP 316L SS samples, whilst no such tendency was observed for wrought 316L SS. Occurrence of pseudoelasticity in PM-HIP sample can be attributed to the formation of deformation-induced ε-martensite (hcp), while the wrought specimen is deformed by dislocation slip. Differences in irradiation-induced defects in both steels can explain these differences in deformation mode. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Mechanical Properties, Phase Transformations |