Effect of continuous polyamorphic transition on the properties of high-entropy metallic glasses

<p indent="0mm">The polyamorphic transition enables materials to achieve structural diversity without altering their chemical composition, thus allowing for the modulation of their properties. In contrast to conventional metallic glasses (MGs) that undergo first-order polyamorphic transitions within the supercooled liquid region, high-entropy metallic glasses (HEMGs) experience a continuous polyamorphic transition (CPT). This CPT in HEMGs involves a succession of changes in density and structural parameters, which facilitates the generation of a diverse array of glassy states. This study utilizes a TiZrHfCuNi HEMG as a model system to investigate the alterations in thermal stability, characteristics of the boson peak, and mechanical properties associated with the CPT. The study aims to elucidate the impact of CPT on the thermodynamic properties, structural evolution, and mechanical responses of HEMGs. The findings indicate that by adjusting the extent of CPT in HEMGs, it is possible to finely tune their thermodynamic and mechanical attributes, highlighting the significant potential of CPT in the continuous property tuning of HEMGs.