Dynamic plasticity and failure of microscale glass: Rate-dependent ductile-brittle-ductile transition

1 Dynamic plasticity and failure of microscale glass: Rate-dependent ductile-brittle-ductile transition Rajaprakash Ramachandramoorthy +1 *, Jakob Schwiedrzik +1 *, Laszlo Petho 1 , Carlos Guerra- Nuñez 1 , Damian Frey 2 , Jean-Marc Breguet 2 , Johann Michler 1 * + - Equal contribution * - Corresponding authors 1 - Laboratory of Mechanics of Materials and Nanostructures, Empa – Swiss Federal Laboratories for Materials Science and Technology, Feuerwerkerstrasse 39, 3602 – Thun. Switzerland. 2 - Alemnis AG, Feuerwerkerstrasse 39, 3602 – Thun. Switzerland. Keywords: High strain rate, amorphous, micromechanics, glass, plasticity Abstract Glass is recently envisioned as a stronger and more robust alternative to silicon in MEMS applications including high frequency resonators and switches. Identifying the dynamic mechanical properties of microscale glass is thus vital for understanding their ability to withstand shocks and vibrations in such demanding applications. But despite nearly half-a-century of research, the micromechanical properties of glass and amorphous materials in general, are This document is the accepted manuscript version of the following article: Ramachandramoorthy, R., Schwiedrzik, J., Petho, L., Guerra-Nuñez, C., Frey, D., Breguet, J. M., & Michler, J. (2019). Dynamic plasticity and failure of microscale glass: rate-dependent ductile–brittle–ductile transition. Nano Letters, 19(4), 2350-2359. https://doi.org/10.1021/acs.nanolett.8b05024

Dynamic plasticity and failure of microscale glass: Rate-dependent ductile-brittle-ductile transition

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high strain rate

amorphous

micromechanics

glass

plasticity