About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Mechanical Response of Materials Investigated through Novel In-situ Experiments and Modeling
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Presentation Title |
Dynamic Cryo-mechanical Properties of Dewetted Nickel Microparticles |
Author(s) |
Barbara Bellon Lara, Gerhard Dehm, Rajaprakash Ramachandramoorthy |
On-Site Speaker (Planned) |
Barbara Bellon Lara |
Abstract Scope |
The working conditions of micro/nano-scaled metallic systems have a crucial influence on their mechanical properties. However, they remain unexplored on microscaled metals under extreme loading conditions, like high strain rates (0.1/s to 10000/s) and extreme temperatures (-150ºC to 600°C). Recent studies under quasi-static loading conditions show that single-crystalline microscale metals exhibit strength close to the theoretical values. However, under extreme conditions, there is a lack of information on the mechanical properties and deformation mechanisms
We plan to bridge this gap by performing in-situ compressions of single-crystalline nickel microparticles at strain rates from 0.005 to 10000/s, at room and cryo temperatures inside a scanning electron microscope. The microparticles were obtained via solid-state dewetting of nickel thin films and their microstructure was characterized using a variety of electron-based advanced microscopy techniques. In summary, a complete deformation map of pristine microscale nickel will be presented as a function of temperature and strain rate.
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Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Copper / Nickel / Cobalt, Thin Films and Interfaces |