The behavior of stress correlations and glass transition temperature in liquid aluminum at cooling and heating process

EM Kirova and VV Pisarev, XXXII INTERNATIONAL CONFERENCE ON INTERACTION OF INTENSE ENERGY FLUXES WITH MATTER (ELBRUS 2017), 946 (2018).

DOI: 10.1088/1742-6596/946/1/012115

Molecular dynamics study of stress correlations and shear viscosity behavior of the rapidly cooled and re-heated liquid aluminum film is performed. The embedded atom method potential is used at the simulation. The stress correlation behavior is studied in the plane of the film and along the direction normal to the plane. The behavior of the kinematic viscosity and the stress correlations are compared for cooling and heating process. Using two methods we showed that the glass transition for the cooling process is higher than for the heating. The first method is based on the stress correlations in the plane of the film and the steep change of the kinematic viscosity. The second method is based on the transverse oscillations in the film. The glass transition temperature is estimated from the dependence of the oscillation damping on temperature. The increasing in the kinematic viscosity correlates with the decrease of transverse oscillations damping in the film.

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