| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
Mapping Directed Energy Deposition of Nickel Superalloys Through In-situ Synchrotron Radiography |
| Author(s) |
Imogen Cowley, Yunhui Chen, Sebastian Marussi, Kai Zhang, Chu Lun Alex Leung, Marta Majkut, Maureen Fitzpatrick, Martyn A. Jones, Peter D. Lee |
| On-Site Speaker (Planned) |
Imogen Cowley |
| Abstract Scope |
Directed Energy Deposition (DED) is an Additive Manufacturing (AM) technology which offers new repair capabilities for high-value superalloy aerospace components. However, DED-produced components are susceptible to heterogeneity and defects (such as porosity, cracking, lack-of-fusion, and poor surface finish). Current research relies upon post-build ex situ analysis of samples to relate process parameters to resulting microstructural features and material properties, and there is a lack of understanding of the dynamic physical mechanisms that underpin these relationships. Here, in situ and operando synchrotron radiography (ESRF ID-19, beamtime MA4857) is used to study Blown-Powder DED of RR1000, a nickel superalloy used in turbine disk applications, to map process-microstructure-property relationships and reveal underlying physical phenomena. Process phenomena and microstructural features are analysed for a range of processing parameters, and new dynamic defect formation phenomena were observed, from which quality-optimisation strategies are proposed. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Powder Materials, High-Temperature Materials |