Strong beta relaxation in high entropy bulk metallic glasses

beta relaxation of metallic glasses (MGs) has already been researched deeply in recent years. In contrast to MGs, which are usually composed of a principal element and another less solute element, we develop a series of new near equal-atomic high-entropy bulk MGs (HE-BMGs) that exhibit fully amorphous structures. The dynamic mechanical properties of HE-BMGs were investigated following a dynamic mechanical analysis. Pronounced beta relaxation behaviors were observed in HE-BMGs over a wide range of temperatures and frequencies for each HE-BMG. The larger negative values of average chemical enthalpy and entropy can enhance beta relaxation in HE-BMGs. These HE-BMGs may provide a new system to investigate and understand the origin of beta relaxation in glassy solids. Published under license by AIP Publishing.