Cavitation-Induced Fracture Causes Nanocorrugations in Brittle Metallic Glasses

Brittle metallic glasses exhibit a unique and intriguing fracture morphology of periodic nanocorrugations whose spacing and amplitude are of the order of tens of nanometers. We show through continuum simulations that they fail by spontaneous and simultaneous cavitation within multiple weak zones ari...

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Published in:Physical review letters 2016-07, Vol.117 (4), p.044302-044302, Article 044302
Main Authors: Singh, I, Narasimhan, R, Ramamurty, Upadrasta
Format: Article
Language:English
Subjects:
Amorphous materials
Brittle fracture
Cavitation
Continuums
Dissipation
Fracture mechanics
Metallic glasses
Nanostructure
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description Brittle metallic glasses exhibit a unique and intriguing fracture morphology of periodic nanocorrugations whose spacing and amplitude are of the order of tens of nanometers. We show through continuum simulations that they fail by spontaneous and simultaneous cavitation within multiple weak zones arising due to intrinsic atomic density fluctuations ahead of a notch tip. Dynamic crack growth would then occur along curved but narrowly confined shear bands that link the growing cavities. This mechanism involves little dissipation and also explains the formation of nanocorrugations.
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Amorphous materials
Brittle fracture
Cavitation
Continuums
Dissipation
Fracture mechanics
Metallic glasses
Nanostructure
title Cavitation-Induced Fracture Causes Nanocorrugations in Brittle Metallic Glasses
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