Mechanical Relaxation of a Ti36.2Zr30.3Cu8.3Fe4Be21.2 Bulk Metallic Glass: Experiments and Theoretical Analysis

Abstract

The dynamic mechanical relaxation behavior of Ti 36.2 Zr 30.3 Cu 8.3 Fe 4 Be 21.2 bulk metallic glass with good glass-forming ability was investigated by mechanical spectroscopy. The mechanical relaxation behavior was analyzed in the framework of quasi-point defects model. The experimental results demonstrate that the atomic mobility of the metallic glass is closely associated with the correlation factor χ. The physical aging below the glass transition temperature T g shows a non-Debye relaxation behavior, which could be well described by stretched Kohlrausch exponential equation. The Kohlrausch exponent aging reflects the dynamic heterogeneities of the metallic glass. Both concentration of "defects" and atomic mobility decrease caused by the in situ successive heating during the mechanical spectroscopy experiments.

Effect of minor addition on dynamic mechanical relaxation in ZrCu-based metallic glasses

“…In the study of Zr57Nb5Al10Cu15.4Ni12.6, aging increased with annealing temperature for Ta/Tg > 0.942 but did not fluctuate much for Ta/Tg < 0.942 [50] . In the current work, the decrease of aging with the increase of annealing temperature accords with the results of Ti36.2Zr30.3Cu8.3Fe4Be21.2 metallic glass [51] .…”

Effect of Sample-Size on the Compression Deformation Behavior of a CuZr-Based Bulk Metallic Glass Composite

“…In recent years, various efforts have been made to overcome this limitation. It has been reported that the formation of BMG composites (BMGCs) is an effective approach to improve the room-temperature plasticity of BMGs [5][6][7]. CuZr-based BMGs exhibit excellent glass-forming ability.…”