About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
|
Symposium
|
6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
Defect Interrogation in Additive Manufactured Inconel 738 Turbine Blades |
Author(s) |
Paul Brackman, Curtis Lee Frederick, Andres Marquez-Rossy, Michael Kirka |
On-Site Speaker (Planned) |
Paul Brackman |
Abstract Scope |
Development of Inconel 738 turbine blades produced by additive manufacturing (AM) involved mitigation of porosity, cracks, and contamination. Multi-length scale microscopy & microanalysis by X-Ray CT and SEM/EDS/EBSD were required to improve the AM processing parameters. Determination of the effects of hot isostatic pressure (HIP), specifically which defects were healed and root cause of large cracks found in early blades, were two questions addressed by this characterization protocol. In one example, a 0.75mm pore was located and tracked with X-ray CT before and after a HIP cycle. EDS and EBSD was used to determine grain orientation and elemental distribution near the pore. In the second case, a sub-surface crack initiated by contamination in a 2mm pore was identified by X-ray CT. By extracting this region and using SEM/EDS, the contaminate was identified. The combination of X-ray CT and SEM/EDS/EBSD was essential in improving the quality of AM produced turbine blades. |
Proceedings Inclusion? |
Definite: Other |