| About this Abstract |
| Meeting |
10th International Symposium on Superalloy 718 and Derivatives (2023)
|
| Symposium
|
Superalloy 718 and Derivatives
|
| Presentation Title |
Hot Ductility and Microstructural Evolution of Hastelloy X Produced by Laser Metal Deposition using Powder as Feedstock Material (DED-p) |
| Author(s) |
Fabian Hanning, Daniel Benages Vila |
| On-Site Speaker (Planned) |
Fabian Hanning |
| Abstract Scope |
The microstructural evolution of Hastelloy X produced by laser metal deposition using powder as feedstock material has been investigated. A laser power of 1750W together with a scanning speed of 15mm/s and a powder feed rate of 8g/min have been used for deposition based on a DOE using single track depositions. The resulting build microstructure consists of epitaxially grown elongated grains spanning over several deposition layers. Mo-rich precipitates are present on solidification grain boundaries as continuous films. Hot ductility testing shows a narrow brittle temperature range as ductility recovery is rapid in the material, a depressed melting point is however evident as compared to equilibrium solidus of the material. The presence of hot cracks in larger build structures indicates a connection to the hot ductility signature of Hastelloy X and the presence of Mo-rich precipitates on solidification grain boundaries. Phase identification and further microstructural characterization is ongoing to identify the underlying cracking mechanism in DED-p Hastelloy X. |
| Proceedings Inclusion? |
Definite: At-meeting proceedings |