About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Accelerated Qualification Methods for Nuclear Reactor Structural Materials
|
| Presentation Title |
High-Temperature Creep Properties of Solution Annealed, Additively Manufactured 316H Stainless Steel: Effects of Process Parameter and Build Direction |
| Author(s) |
John Snitzer, Benjamin Sutton, John Shingledecker, Xiaoyuan Lou |
| On-Site Speaker (Planned) |
John Snitzer |
| Abstract Scope |
This work examines the creep response of solution-annealed additively manufactured (AM) 316H stainless steel (SS) produced by laser-powder direct energy deposition (DED). The work further narrows the scope to evaluate the effects of laser power and build direction on the creep properties. Creep testing was conducted at 650°C at varying stresses from 130 to 200 MPa to ensure that dislocation climb-dominated creep was the primary mechanism. Solution annealing removed the as-built chemical segregation and cellular structures, forming a heterogeneous, partially recrystallized grain structure with subgrain structures pinned by oxide particles. Despite solution annealing, the laser power and build direction significantly influenced the microstructure resulting in AM specimens exhibiting higher minimum creep rates and lower rupture lives compared to wrought 316H. This work highlights the limitations in using wrought properties and heat-treatments when producing AM materials leading to important considerations when incorporating AM 316H into ASME BPV Section III Division 5. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, Other |