About this Abstract |
Meeting |
2021 TMS Annual Meeting & Exhibition
|
Symposium
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Advanced Characterization Techniques for Quantifying and Modeling Deformation
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Presentation Title |
Spatial Localization of Dislocation Avalanches in Microplasticity of a High-entropy Alloy |
Author(s) |
Quentin P.G. Rizzardi, Robert E. Maass |
On-Site Speaker (Planned) |
Quentin P.G. Rizzardi |
Abstract Scope |
While intermittent plasticity in microplasticity is a well-studied phenomenon, the precise nature of the underlying collective dislocation mechanisms is still being discussed; most research so far has been limited to the statistical aspect of discrete slip events (collective avalanches). Here, we aimed to reconcile the statistical picture with a more pointed look at the actual spatial distribution of slip within the crystal; to that end, we observed a high-entropy alloy microcrystal undergoing uniaxial compression and associated the measured avalanches with their resulting slip morphologies on the microcrystal surface. The categorization of slip and avalanche behavior allows us to shed some light onto what types of slip underlie specific parts of the overall slip-size distribution. We find that certain types of avalanches, as categorized by their respective slip morphology, favor different parts of the full slip-size distribution and exhibit statistical behavior different from the expected power-law form. |
Proceedings Inclusion? |
Planned: |