| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Microstructural and Mechanical Long-term Stability of AM Materials
|
| Presentation Title |
Additive Manufacturing and Characterization of A709 Stainless Steels for Nuclear Applications |
| Author(s) |
Subhashish Meher, Asif Mahmud, Peter Renner, John Snitzer, Xiaoyuan Lou, Isabella van Rooyen |
| On-Site Speaker (Planned) |
Subhashish Meher |
| Abstract Scope |
This work presents a systematic study on laser directed energy deposition (DED) based additive manufacturing of nuclear-grade austenitic A709 stainless steels. For optimization of build quality, samples of 1 cm3 were deposited with a broad range of laser powers, scan speeds and hatch spacings that resulted in densities more than 99.8%. The microstructural study was carried out using scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Mechanical properties were measured by Vickers hardness. The microstructures and hardness values guided heat treatments of these alloys. Further, tensile samples were extracted from DED-fabricated alloys utilizing the optimized process parameters. The room temperature tensile tests were carried on A709 alloy and were compared with the values available in the literature for wrought and laser powder bed fusion builds. The objective of this work is to understand DED process for fabrication of structural components of nuclear reactors. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Characterization |