About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
The Interest of Lab-Based DCT for the 3D Characterization of Monocrystalline Nickel-Based Alloys |
Author(s) |
Alexiane Arnaud, Jun Sun, Florian Bachmann, Vladimir Esin, Henry Proudhon |
On-Site Speaker (Planned) |
Alexiane Arnaud |
Abstract Scope |
In the aerospace industry, single crystal nickel-based is used to manufacture high-pressure turbine blades, which are the most critical part of the engine. These alloys have a dendritic microstructure, usually produced by Bridgman furnace, where each dendrite can be associated with a crystalline orientation. Thus, this dendritic network is actually represented by subgrains separated by low-angle grain boundaries. The 3D characterization of a monocrystalline René N5 superalloy has been performed by lab-based diffraction contrast tomography (DCT). This experiment has demonstrated the precise capabilities of lab-based DCT in resolving subgrain boundaries with a misorientation angle of less than 1°, achieving an angular accuracy as fine as 0.1°. A slice from the 3D reconstruction has been compared with standard electron backscatter diffraction (EBSD) mapping. Obtaining the 3D microstructure non-destructively enabled the segmentation of the network of single-crystal dendrites, opening up new opportunities for studying crystal mosaicity. |
Proceedings Inclusion? |
Undecided |