Publication Type
Journal
Journal Name
Journal of Materials Research
Publication Date
Page Numbers
915 to 922
Volume
21
Issue
4
Abstract
In this study, we demonstrated that the failure of BMGs results from sudden temperature rise within shear band. Using a shear-transformation-zone model, we successfully calculated the temperature within a shear band and found it consistent with the observation from an in-situ infrared thermographic system. The instantaneous temperature within a shear band (Ts) at fracture agrees remarkably well with the glass transition temperature (Tg), providing a new criterion to determine the strength of BMGs from their Tg. This agreement also discloses the fact that catastrophic failure of BMG is caused by the sudden drop in viscosity inside the shear band when Ts approaches Tg.