| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Dependence of Sink Strength Effects on Defect Evolution in Dual-ion Irradiated Additive-Manufactured HT9 |
| Author(s) |
Pengyuan Xiu, Niyanth Sridharan, Kevin Field |
| On-Site Speaker (Planned) |
Pengyuan Xiu |
| Abstract Scope |
Additive-manufacturing (AM) is attracting attention in the nuclear materials community for the fabrication of ferritic-martensitic steels due to the flexibility of composition and geometry control of structural components during the build. In this study, the dual-ion-irradiation responses of three conditions of AM-HT9 are evaluated including the as-built (ASB) from the direct-energy-deposition as well as two other conditions from the same build with different post-build heat-treatments (ACO3 and FCRD). The test matrix includes varying irradiation dose from 16.6 dpa to 250 dpa at 445°C, and varying temperatures from 400°C to 480°C with constant injected helium appm/dpa ratio of 4. Significant disparity of radiation responses among the three conditions of AM-HT9 is observed, with ASB condition exhibiting much more retarded defect evolution including Ni-rich clusters and cavity swelling compared to ACO-3 and FCRD. This is probed by discussing the effects of sink strengths in these alloys tailored by AM and heat-treatment processes. |
| Proceedings Inclusion? |
Undecided |