NSUF 17-728: Radiation-Hardening and Microstructural Stability of NF709 Austenitic Stainless Steel

Austenitic stainless steel NF709 has been down-selected for development as a candidate structural materials for sodium-cooled fast reactors. However, the understanding on its radiation resistance is limited to a few model or simplified alloys. Our recent firsthand microstructural characterization indicated significant evolution of precipitates in NF709 after irradiation to 3 displacements per atom (dpa) at 500°C. To better understand radiation resistance of NF709, this project is to study radiation-hardening and microstructural evolution of NF709 irradiated to 6 dpa at 400, 500, and 700°C. The outcome of this study will provide key insights to understand radiation resistance of Alloy 709 that is optimized from NF709 under the Advanced Reactor Technologies (ART) program.

Additional Info

Field	Value
Abstract	Austenitic stainless steel NF709 has been down-selected for development as a candidate structural materials for sodium-cooled fast reactors. However, the understanding on its radiation resistance is limited to a few model or simplified alloys. Our recent firsthand microstructural characterization indicated significant evolution of precipitates in NF709 after irradiation to 3 displacements per atom (dpa) at 500°C. To better understand radiation resistance of NF709, this project is to study radiation-hardening and microstructural evolution of NF709 irradiated to 6 dpa at 400, 500, and 700°C. The outcome of this study will provide key insights to understand radiation resistance of Alloy 709 that is optimized from NF709 under the Advanced Reactor Technologies (ART) program.
Award Announced Date	2017-04-24T10:10:01.383
Awarded Institution	None
Facility	None
Facility Tech Lead	Kory Linton
Irradiation Facility	None
PI	Lizhen Tan
PI Email	[email protected]
Project Type	RTE
RTE Number	728