| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Elucidating Microstructural Evolution Under Extreme Environments
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| Presentation Title |
Heterogeneous Void Formation in Irradiated AM 316L and AM316H Stainless Steels |
| Author(s) |
Wei-Ying Chen, Sanjoy Mazumder, Stephen Taller, Andrea Jokissari, Rongjie Song, Yiren Chen |
| On-Site Speaker (Planned) |
Wei-Ying Chen |
| Abstract Scope |
Additively manufactured (AM) 316 stainless steel exhibit unique dislocation cell structure due to the rapid solidification in 3D printing. TEM was used to examine the defect evolution in AM316L and AM316H irradiated with 4 MeV Ni ions at 300°C and 600°C from 0.2 dpa to 10 dpa with a dose rate of 10-3 dpa/s. At 2 dpa, the initial dislocation cell structure transformed into a dislocation network at 600°C, while dense irradiation-induced defects were observed at 300°C. Voids, absent at 300°C, were found at 600°C distributing in cell structures. Notably, no voids were found at grain boundaries. RIS caused Ni and Si to segregate around voids and grain boundaries. Cluster dynamics simulations were performed to understand the origin of this heterogeneous void formation and to extrapolate findings to lower dose rate conditions. Additionally, the influence of carbon content and the difference between AM and wrought materials are discussed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Nuclear Materials, Iron and Steel, Environmental Effects |