About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Developments in Advanced Nuclear Structural Materials
|
| Presentation Title |
Creep Damage Quantification in LPBF Ni-Based Alloys to Improve Creep Lifetime Prediction |
| Author(s) |
Sebastien Dryepondt, Holden Hyer, Amanda Heimbrook, Rahul Franklin, Amir Ziabari, Sam Bell, Yi-Feng Su, Chase Joslin |
| On-Site Speaker (Planned) |
Sebastien Dryepondt |
| Abstract Scope |
The Advanced Materials and Manufacturing Technologies program aims to accelerate the deployment of novel materials and manufacturing methods for nuclear applications. Ni-based alloys provide enhanced strength and corrosion resistance relative to advanced steels at temperatures exceeding 700°C. This work evaluates the creep performance of γ′-strengthened 282 and solid-solution-strengthened 625 alloys, both produced via laser powder bed fusion (LPBF). Alloys 282 and 625 were subjected to respective heat treatments of 1 h/1180 °C+4 h/800 °C and 1 h/1150 °C. Creep testing was conducted at 725–750 °C, with interruptions to evaluate defect evolution via X-ray computed tomography (XCT) and microstructural analysis. Creep-induced cracking observed in alloy 282 initiated at either large LPBF flaws or grain boundaries. Alloy 625 was tested in both the as-fabricated and annealed conditions, exhibiting flaw sizes too small to significantly affect creep behavior. This combinatorial approach with using non-destructive, interrupted creep testing provided valuable insights for improving lifetime prediction models for LPBF Alloy 625. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Nuclear Materials, Mechanical Properties |