Localized heating and fracture criterion for bulk metallic glasses
Source abstract
Abstract
In this study, we demonstrated that the failure of bulk metallic glasses (BMGs) results from a sudden temperature rise within a 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 at fracture agrees remarkably well with the glass transition temperature (Tgproviding a new criterion to determine the strength of BMGs from theirTg. This agreement also discloses the fact that catastrophic failure of BMG is caused by the sudden drop in viscosity inside the shear band when the instantaneous temperature within a shear band approachesTg.
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Research context
OpenAlex topics: Metallic Glasses and Amorphous Alloys · Glass properties and applications · Material Dynamics and Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
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