[Download]Name: Jiang H Y, Luo P, Wen P, et al. The near constant loss dynamic mode in metallic glass[J]. Journal of Applied Physics, 2016, 120(14): 145106.

Class: 2016

Content:
The near constant loss (NCL) in relaxation spectra is a crucial dynamic phenomenon for glass-forming materials, while its underlying mechanism remains unclear and hard to study due to the absence of characteristic time scale. We define a characteristic crossover point, from both the dynamic mechanical measurements and the quasi-static tension experiments in metallic glasses (MGs), to study the transition regime where the NCL dynamics terminates and evolves to the initiation of the β-relaxation. We found that such transition shows an apparent activation energy well below that of the β-relaxation.  Our results also show the concomitant change of the crossover points and the NCL with aging and provide a cursory physical picture on how the NCL occurs, decays and evolves to the β- and 冄-relaxations in MGs.