Intrinsic Correlation between the Fraction of Liquidlike Zones and the β Relaxation in High-Entropy Metallic Glasses

Lacking the structural information of crystalline solids, the origin of the relaxation dynamics of metallic glasses is unclear. Here, we report the evolution of stress relaxation of high-entropy metallic glasses with distinct beta relaxation behavior. The fraction of liquidlike zones, determined at each temperature by the intensity of stress decay, is shown to be directly related to both the aging process and the spectrum of relaxation modes obtained by mechanical spectroscopy. The results shed light on the intrinsic correlation between the static and dynamic mechanical response in high-entropy and conventional metallic glasses, pointing toward a sluggish diffusion high-entropy effect in the liquid dynamics.

Automated summary

This study investigates the evolution of stress relaxation in high-entropy metallic glasses and reveals a direct relationship between the fraction of liquidlike zones and the aging process as well as the relaxation modes spectrum. It sheds light on the intrinsic correlation between the static and dynamic mechanical response in high-entropy and conventional metallic glasses.