About this Abstract |
Meeting |
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Symposium
|
2022 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2022)
|
Presentation Title |
Modeling of IN718 precipitates' growth
in powder-bed fusion (in-situ and post-build
aging) |
Author(s) |
Jakub Mikula, Rajeev Ahluwalia, Robert Laskowski, Kun Wang, Guglielmo Vastola, Yong-Wei Zhang |
On-Site Speaker (Planned) |
Jakub Mikula |
Abstract Scope |
Nano-sized γ' and γ'' precipitates form the backbone of Inconel 718 alloy, allowing the material to operate under extreme thermo-mechanical conditions. Interestingly, in additive manufacturing of IN718, the formation of precipitates is rarely observed and usually, a post-build heat treatment process is required to achieve the desired mechanical response. This holds true for the case of standard printing conditions. However, exerting more unconventional control over the printing process may unlock the potential of additive manufacturing to induce precipitate formation also in the as-built state and develop gradual microstructural changes within the printed part. Here, we aim to investigate the amenability of various printing conditions to formation of precipitates during the printing stage by developing a two-scale finite element / phase-field simulation framework. We apply the framework to the geometry of centrifugal impeller and explicitly show precipitate nucleation and growth driven by the local thermal history within the printed part. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |