About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Additive Manufacturing of Metals: Applications of Solidification Fundamentals
|
Presentation Title |
Predicting Phase and Morphology for Use in Site Specific Control of Microstructures in L-PBF Stainless Steel |
Author(s) |
Michael Haines, Maxwell Moyle, Nima Haghdadi, Sophie Primig |
On-Site Speaker (Planned) |
Michael Haines |
Abstract Scope |
Much interest in metal additive manufacturing (AM) is related to the many opportunities open by production of geometries with unlimited complexity that cannot be produced through traditional methods such as casting and forging. However, despite AM’s benefits, process variations make it difficult to predict final microstructures and mechanical properties. 17-4PH stainless steel is one such alloy that is notably sensitive to process variations. While traditionally known to be a martensitic precipitation hardened stainless steel, under AM, there have been differing reports on the formation of δ-ferrite, γ-austenite, and α'-martensite depending on the processing conditions utilized. This study uses interface response functions (IRF) in connection with heat transfer simulations to predict the resulting phases in laser powder bed fusion (L-PBF) 17-4PH. The simulation is shown to agree with experimental results. This study will allow for the development of parameter sets that permit site specific control of phases within a given geometry. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Computational Materials Science & Engineering, Solidification |