About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Industry
|
| Presentation Title |
Microstructure driven creep failure of 316H stainless steel fabricated via laser powder bed fusion |
| Author(s) |
Peeyush Nandwana, Sebastien Dryepondt, Gyan Shankar, Bryan Lim, Rangasayee Kannan, Matthew Boebinger, Caleb Massey, Noah Holtham, Chase Joslin, Frank Brinkley, Ryan Dehoff |
| On-Site Speaker (Planned) |
Peeyush Nandwana |
| Abstract Scope |
316H stainless steel (SS) is one of the 6 code qualified materials for use in nuclear applications. Laser powder bed fusion (LPBF) can accelerate the development of next generation reactors by enabling the fabrication of complex components. However, low creep ductility has emerged as a critical challenge to qualification of LPBF manufactured 316H SS. In this talk we elucidate that the solute segregation resulting from the extreme thermal gradients during LPBF accelerates the formation of Laves, Sigma and M23C6 phases compared to wrought material. The formation of these phases at high angle grain boundaries results in poor creep ductility. Additionally, we note that in some cases, the microstructure driven creep failure dominates damage posed by lack of fusion defects formed during LPBF. Finally, we discuss potential strategies to mitigate segregation in the as-fabricated material. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Iron and Steel, Nuclear Materials, Additive Manufacturing |