Grain Rotation and Crack Propagation in Bulge-Tested Gold Films with 4D-STEM
Gebhart DD, Schretter L, Krapf A, Merle B, Cordill MJ, Gammer C (2025)
Publication Type: Journal article
Publication year: 2025
Journal
DOI: 10.1007/s11837-025-07241-1
Abstract
This work investigates the stable crack propagation in notched, ultrafine-grained, freestanding Au films under cyclic loading with a bulge tester. Using intermittent transmission electron microscopy, including 4D scanning transmission electron microscopy, the study investigates dislocation activities and grain-boundary-mediated processes during crack propagation at nanoscale resolution. The regions surrounding the propagating crack show significant out-of-plane grain rotation, grain boundary migration, and grain growth and coalescence. Orientation mapping highlighted the influence of grain orientations and misorientations on deformation localization and the crack propagation path, emphasizing the complex interplay of microstructural features in fatigue properties. The findings highlight the role of grain-boundary-mediated mechanisms in the cyclic fatigue of metallic thin films, providing insights into damage mechanisms at the nanoscale.
Authors with CRIS profile
Involved external institutions
Erich Schmid Institute of Materials Science of the Austrian Academy of Sciences
Austria (AT)
Universität Kassel
Germany (DE)
Austria (AT)
Universität Kassel
Germany (DE)
How to cite
APA:
Gebhart, D.D., Schretter, L., Krapf, A., Merle, B., Cordill, M.J., & Gammer, C. (2025). Grain Rotation and Crack Propagation in Bulge-Tested Gold Films with 4D-STEM. JOM Journal of the Minerals, Metals and Materials Society. https://doi.org/10.1007/s11837-025-07241-1
MLA:
Gebhart, David D., et al. "Grain Rotation and Crack Propagation in Bulge-Tested Gold Films with 4D-STEM." JOM Journal of the Minerals, Metals and Materials Society (2025).
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