| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing of Large-scale Metallic Components
|
| Presentation Title |
Large Area Deposition of Haynes 230 |
| Author(s) |
Sergio Ausejo, Laura Acebo, Nerea Burgos, David Linder, Savya Sachi, Ida Berglund, Mustafa Megahed |
| On-Site Speaker (Planned) |
Mustafa Megahed |
| Abstract Scope |
Powder-based direct energy deposition (p-DED) is pursued to repair and enhance surface properties of large components. Its wide application is limited by the trade-off between process efficiency (e.g., deposition rates) and the deposits' quality (e.g., porosity, cracks, detrimental phases). This work showcases the integration of multi-scale multi-physics computational and experimental methods (ICME) in optimizing the laser cladding process of Haynes 230, by addressing the key process-structure relationships. Numerical simulations are supported by materials thermo-physical properties predicted by the CALPHAD-based approach and are used to assess the melt pool stability and crack susceptibility. Comparison of process simulations with experimental data show good agreement in that high deposition rates are difficult to achieve. Larger laser spot sizes tend to lead to melt pool instabilities, while smaller spot sizes lead to less instability but to higher thermal loads and cracking. The compromise achieved is discussed and possible process optimization is briefly presented. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, High-Temperature Materials, ICME |