| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Large-scale Metallic Components
|
| Presentation Title |
Wire Arc Processing of Stainless Steels; Microstructure and Properties |
| Author(s) |
Patxi Fernandez-Zelaia, Andrzej Nycz, Quinn Campbell, Yousub Lee, Michael Kirka |
| On-Site Speaker (Planned) |
Patxi Fernandez-Zelaia |
| Abstract Scope |
Large scale additive manufacturing (AM) offers significant opportunities to scale AM to larger components. Fundamentally the process science is driven by the established welding knowledge but there are still many materials challenges to be addressed prior to widespread industrial adoption. We share our recent work on arc welding AM of 316L and 17-4PH stainless steels. In 316L an extremely sharp crystallographic texture is observed with a strong {011} preference in the build direction and {001} in the travel direction. This solidified microstructure is driven by the weld pool morphology and deposition pattern. The 17-4PH material is martensitic with lathes that effectively homogenize the microstructure. Whereas the 316L exhibits anisotropic mechanical behavior, similar to that of a single crystal, the 17-4PH is isotropic. This work demonstrates that detailed characterization of deposited material is necessary for qualification of AM materials and that the behavior can be explained by the fundamental process-structure-property relations. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Process Technology |