About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing for Energy Industry
|
| Presentation Title |
Creep Anisotropy in Additively Manufactured Austenitic Stainless Steels |
| Author(s) |
Mary H. Dunbar, Olivia DeNonno, Stephen Tate, Robert Hamlin, Jonah Klemm-Toole |
| On-Site Speaker (Planned) |
Mary H. Dunbar |
| Abstract Scope |
The power generation industry is interested in adopting additive manufacturing (AM) for nuclear applications due to its potential to reduce lead times, simplify supply chains, and enable the fabrication of complex or obsolete components. Implementation of AM components remains limited by insufficient understanding of elevated-temperature performance. This work evaluates the creep behavior of GMA-DED and L-PBF 316L at 650°C, 750°C, and 825°C as a function of build orientation. At 650°C, horizontal GMA-DED and L-PBF samples exhibit superior creep performance compared to vertical samples due to texture-dependent dislocation slip and work hardening behavior. At higher creep temperatures, vertical samples begin exhibiting superior creep performance due to reduced diffusional creep rates associated with columnar grain orientation. An updated diffusional creep model for AM columnar microstructure is presented. The creep performance of AM 316L is compared with wrought 316L to assess suitability for use in creep-limited applications. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Mechanical Properties |