| Autor: |
Jiménez, M., Ludwig, W., Gonzalez, D., Molina-Aldareguia, J. M. |
| Rok vydání: |
2018 |
| Předmět: |
|
| Zdroj: |
Scripta Materialia, Volume 162, 15 March 2019, Pages 261-265 |
| Druh dokumentu: |
Working Paper |
| DOI: |
10.1016/j.scriptamat.2018.11.008 |
| Popis: |
Crack initiation and propagation under high-cycle fatigue conditions have been investigated for a polycrystalline Ni-based superalloy by in-situ synchrotron assisted diffraction and phase contrast tomography. The cracks nucleated along the longest coherent twin boundaries pre-existing on the specimen surface, that were well oriented for slip and that presented a large elastic incompatibility across them. Moreover, the propagation of microstructurally short cracks was found to be determined by the easy slip transfer paths across the pre-existing grain boundaries. This information can only be obtained by characterization techniques like the ones presented here that provide the full set of 3D microstructural information. |
| Databáze: |
arXiv |
| Externí odkaz: |
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