| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Alloy Development for Energy Technologies: ICME Gap Analysis
|
| Presentation Title |
Design of Creep-resistant Additively Manufactured Stainless Steels for Nuclear Reactors |
| Author(s) |
Pedro Rivera-Diaz-Del-Castillo, Wei Wen, Weiling Wang, Hossein Eskandari Sabzi |
| On-Site Speaker (Planned) |
Pedro Rivera-Diaz-Del-Castillo |
| Abstract Scope |
Additive manufacturing (AM) emerges as prominent technology for nuclear reactor design. AMed austenitic stainless steels display improved strength and fatigue properties; but their creep properties and their comparison to wrought alloys remain relatively unknown. Knowledge gaps result from: (1) Creep data can take decades to collect, and AM datasets are scarce. (2) Wrought and AM grain morphology are very different. (3) Linking electron backscatter diffraction (EBSD) data with creep modelling is a challenge, particularly for AM. In this work, crystal plasticity finite element method (CP-FEM) simulations are carried out based on grain structure mapping imported directly from EBSD, and adopting a new physics-based plasticity model. The local stress-strain response during creep deformation is predicted. The tertiary creep stages are also captured through the classic Gurson-Tvergaard- Needleman damage model. This work shows that grain boundary orientation determines creep failure of AM alloys, providing a tool for their design against creep. |
| Proceedings Inclusion? |
Planned: |