About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Materials Systems for the Future of Fusion Energy
|
Presentation Title |
N-23: Heavy Ion Irradiation Studies on an Additively Manufactured 316LN Stainless Steel at Elevated Temperatures |
Author(s) |
Zhongxia Shang, Cuncai Fan, Yinmin Morris Wang, Lin Shao, Haiyan Wang, Xinghang Zhang |
On-Site Speaker (Planned) |
Zhongxia Shang |
Abstract Scope |
Additive manufacturing provides ample opportunities to fabricate structural materials and nuclear reactor components with complex geometries and excellent mechanical properties. However, irradiation response of additively manufactured steels is still less well understood. Here, an additively manufactured 316LN stainless steel was studied via in-situ and ex-situ heavy ion irradiation at 400 to 450˚C with a focus on the roles of solidification cellular structures. It was found that dislocations trapped along cell walls exhibit an enhanced irradiation stability compared with those induced by severe plastic deformation. Moreover, the cellular walls with trapped dislocations can serve as effective defect sinks, thus reduce Frank loop density, and mitigate the magnitude of solute segregations along the cellular walls comparing with high angle grain boundary. These findings were compared with previous neutron irradiation studies on wrought 316 counterparts. The current work advances the understandings on high-temperature irradiation response of additively manufactured steels for nuclear reactor applications. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Nuclear Materials, Iron and Steel |