| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Materials in Energy Environments II
|
| Presentation Title |
Functionally Graded Joints Between Ferritic SA508 Low Alloy Steel to Austenitic 316L Stainless Steel Via Laser Directed Energy Deposition |
| Author(s) |
Chenglu Tang, John Snitzer, Jingfan Yang, Evan Mcdermott, Xiaoyuan Lou |
| On-Site Speaker (Planned) |
Chenglu Tang |
| Abstract Scope |
Dissimilar metal joints between ferritic low alloy steel SA508 to austenitic stainless steel 316L are commercially arc-welded as a nozzle-to-safe end component in reactor pressure vessels. Complex weld transition by Ni based alloys is always used to minimize thermal mismatch and improve mechanical properties. In this study, we demonstrate functionally graded joint, by continuously changing the ratio between SA508 to 316L via laser directed energy deposition (DED) additive manufacturing (AM), can improve the mechanical properties and minimize thermal mismatch between two ends. Thermodynamic simulation is employed to optimize the joint configuration. Mechanical and microstructural characterization confirmed the design can minimize the carbide formation across the whole transition zone during post-weld pressure vessel heat treatment, resulting in improved fracture toughness as compared to the joint configurations by other means. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Joining, Additive Manufacturing, Characterization |