Title: Enhancement of quality factor of metallic glass resonators via cyclic training

Author (Snapshot): Meng Fan, Yale University

Abstract:

Metallic glass resonators can possess larger quality factors (i.e., slower rates of energy dissipation) than those for metal alloys since metallic glasses are spatially homogeneous without dislocations and other topological defects. Using numerical simulations, we studied the energy dissipation mechanisms and measured the quality factor Q in model metallic glass cantilevers. We bend the cantilever to a given strain ε, release it, and measure Q from the Fourier transform of the cantilever particle velocities as a function of time. We also found that cyclic shear training enlarges the critical strain value that leads to particle rearrangements and decay of Q.