Prediction of pressure-promoted thermal rejuvenation in metallic glasses

Rejuvenation is the structural excitation of glassy materials,and is a promising approach for improving the macroscopic deformability of metallic glasses.This atomistic study proposes the application of compressive hydrostatic pressure during the glass-forming quenching process and demonstrates highly rejuvenated glass states that have not been attainable without the application of pressure.Surprisingly,the pressure-promoted rejuvenation process increases the characteristic short-and mediumrange order,even though it leads to a higher-energy glassy state.This‘local order’–‘energy’relation is completely opposite to conventional thinking regarding the relation,suggesting the presence of a well-ordered high-pressure glass/high-energy glass phase.We also demonstrate that the rejuvenated glass made by the pressure-promoted rejuvenation exhibits greater plastic performance than as-quenched glass,and greater strength and stiffness than glass made without the application of pressure.It is thus possible to tune the mechanical properties of glass using the pressure-promoted rejuvenation technique.