About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
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Microstructure-Sensitive Design and Advanced Characterization: An MPMD/SMD Symposium Honoring David T. Fullwood
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| Presentation Title |
Deformation Mechanisms in Pristine Ruthenium Microparticles Produced via Solid-State Dewetting |
| Author(s) |
Philipp Kroeker, Amit Sharma, Kamila Hamulka, Tijmen Vermeij, Johann Michler, Xavier Maeder |
| On-Site Speaker (Planned) |
Philipp Kroeker |
| Abstract Scope |
The fundamental deformation mechanisms of hexagonal close-packed (HCP) metals at the sub-micrometer scale remain highly sensitive to initial defect densities. Traditional micromechanical testing often relies on specimens prepared via Focused Ion Beam milling, which introduces artificial dislocation sources that obscure intrinsic size effects. In this study, we bypass these limitations by fabricating pristine Ruthenium (Ru) microparticles utilizing solid-state dewetting. This approach yields virtually dislocation-free, single-crystalline particles with well-defined crystallographic orientations, approximating the equilibrium crystal shape. We perform in-situ micromechanical compression testing on these pristine Ru particles to investigate the fundamental competition between dislocation slip and deformation twinning. We examine the power-law scaling of compressive strength by varying particle size. Additionally, by systematically varying testing temperatures and applied strain rates, we map the activation parameters for defect formation and reveal the upper bounds of mechanical strength in small-scale HCP metals. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Electronic Materials, Magnesium |