| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing: Processing Effects on Microstructure and Material Performance
|
| Presentation Title |
Towards an Additively Manufactured, Wrought-comparable Precipitation-hardening Martensitic Stainless Steel |
| Author(s) |
Fan Zhang, Eric Lass, Mark Stoudt, Carelyn Campbell, Souzan Hammadi, Greta Lindwall, Lyle Levine |
| On-Site Speaker (Planned) |
Fan Zhang |
| Abstract Scope |
Additive manufacturing (AM) poses unique challenges not often associated with traditional manufacturing methods. Specifically, with powders of the correct chemistry, the AM process can lead to heterogeneous microstructures of AM alloys over a wide range of length scales, mostly due to complex thermal conditions of the build at a local level. Thus, a rigorous evaluation of the as-build microstructure and its evolution during post-build heat treatment becomes a critical element in the proper understanding, modeling, and eventual certification of AM alloys.
In this work, we report our progress of developing post-build processing towards making an AM precipitation-hardening martensitic stainless steel with properties comparable to its wrought counterpart. Our approach includes lab-based microscopy and mechanical measurements, in situ synchrotron scattering and diffraction experiments, and thermodynamic modeling. The impact of thermal history on the alloy properties, including martensitic fraction, precipitate size and volume fraction, and hardness will be illustrated. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |