| About this Abstract |
| Meeting |
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Symposium
|
Materials in Nuclear Energy Systems (MiNES) 2021
|
| Presentation Title |
Mitigating Irradiated Assisted Stress Corrosion Cracking with Minor Refractory Element Modification – A High-throughput Approach Using Compositionally-graded Specimen |
| Author(s) |
Jingfan Yang, Laura Boring, Lingfeng He, Miao Song, Zhijie Jiao, Yongfeng Zhang, Daniel Schwen, Lin Shao, Xiaoyuan Lou |
| On-Site Speaker (Planned) |
Jingfan Yang |
| Abstract Scope |
Irradiation experiments and post-irradiation material testing are critical for the new alloy development and qualification in reactor cores. It represents the most costly and lengthy step, and typically follows a one-at-a-time experimental paradigm. This study demonstrates the feasibility of using compositionally gradient specimens, fabricated by laser additive manufacturing, to improve the throughput of stainless-steel composition screening for better irradiated assisted stress corrosion cracking (IASCC) resistance. The low-level doping (<1 wt.%) of minor refractory elements was selected because of its significance on the local atomic level heterogeneity. The study confirmed these elements not only interacted with point defects but also resulted in different grain boundary oxidation, as well as grain-boundary-dislocation interaction. The validity of using compositionally-graded specimens in IASCC evaluation has been demonstrated for two testing methods, constant extension rate test and step load test. The advantages and challenges of using compositionally gradient design for IASCC evaluation will be discussed. |
| Proceedings Inclusion? |
Undecided |