Mechanical cycling and DSC tests

Their parameterization is defined as: Rise γrise and fall time γfall were fixed at γrise =γfall = (1-γhold)/2). By varying the hold time (γhold =0.01, 0.16, 0.33, 0.5, 0.67, and 0.83), the critical impact of hold duration on net energy accumulation was quantified; Triangular waves, with no hold phase (γhold =0), were used to purely investigate the influence of stress rate distribution on rejuvenation.

The waveform is characterized by “linear rise + linear fall”, with the core parameter being rise ratio γrise =0.01, 0.2, 0.4, 0.6, 0.8, and 0.99, corresponding to significant differences in loading and unloading stress rates.2.Thermal properties of glassy samples were characterized by differential scanning calorimetry (DSC, Netzsch 214). Samples were heated from 323 K to 673 K to induce complete crystallization, cooled to 323 K, and then reheated to 673 K for baseline acquisition.

Relaxation enthalpy (also named configuration energy Uc) was computed by integrating exothermic heat flow curves. Aged samples were tested at a heating rate of 3 K/min. For the cycled samples, the acceleration section was removed and a heating rate of 10 K/min was used.3.The meanings of the row labels and column labels in the table data sheet have been clearly indicated in the document.