About this Abstract |
Meeting |
6th International Congress on 3D Materials Science (3DMS 2022)
|
Symposium
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6th International Congress on 3D Materials Science (3DMS 2022)
|
Presentation Title |
Sub-grain-level Fatigue Crack Growth Insights via High Energy X-ray Diffraction Microscopy |
Author(s) |
William D. Musinski, Paul Shade, Mark Obstalecki, David Menasche, Joel Bernier, Sirina Safriet, Peter Kenesei, Jun-Sang Park |
On-Site Speaker (Planned) |
William D. Musinski |
Abstract Scope |
To advance microstructure-based fatigue lifing tools for aircraft engine components, crack growth data obtained at the relevant (microstructure) scale is needed. Towards this end, we present results from a high energy X-ray diffraction microscopy (HEDM) experiment coupling near field HEDM, far field HEDM, micro-computed tomography, and in-situ cyclic loading to study the evolution of sub-grain-level fatigue crack growth within a Ni-base superalloy at room temperature. A starter focused-ion beam notch was introduced within the specimen to concentrate damage within the characterized microstructure area of interest. Periodic micro-computed tomography and far field HEDM measurements were used to monitor the sporadic growth of the primary crack front, void formation in front of the crack front, and grain-level strains ahead of the crack front. Insightful correlations between 3D crack path, local microstructure, and grain boundary effect are elucidated and implications for microstructure-based fatigue lifing tools are discussed. |
Proceedings Inclusion? |
Definite: Other |