Fast Dynamics in a Model Metallic Glass-forming Material

no code implementations • 28 Jan 2021 • Hao Zhang, Xinyi Wang, Hai-Bin Yu, Jack F. Douglas

We investigate the fast $\beta$- and Johari-Goldstein (JG) $\beta$-relaxation processes, along with the elastic scattering response of glass-forming (GF) liquids and the Boson peak, in a simulated Al-Sm GF material exhibiting a fragile-strong (FS) transition.

Materials Science

Dynamic Heterogeneity, Cooperative Motion, and Johari-Goldstein $β$-Relaxation in a Metallic Glass-Forming Material Exhibiting a Fragile to Strong Transition

no code implementations • 27 Jan 2021 • Hao Zhang, Xinyi Wang, Hai-Bin Yu, Jack F. Douglas

We investigate the Johari-Goldstein (JG) $\beta$-relaxation process in a model metallic glass-forming (GF) material (Al90Sm10), previously studied extensively by both frequency-dependent mechanical measurements and simulation studies devoted to equilibrium properties, by molecular dynamics simulations based on validated and optimized interatomic potentials with the primary aim of better understanding the nature of this universal relaxation process from a dynamic heterogeneity (DH) perspective.

Materials Science