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Evolution of elastic heterogeneity during aging in metallic glasses

The properties of glasses vary widely depending on the way they are prepared, even though their structures appear similar. We show that the local potential energy landscape (PEL) sensitively reflects the stability differences through simulation of local structural excitation in a model metallic glas...

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Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2014-06, Vol.89 (6), p.062313-062313, Article 062313
Main Authors: Fan, Yue, Iwashita, Takuya, Egami, Takeshi
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description The properties of glasses vary widely depending on the way they are prepared, even though their structures appear similar. We show that the local potential energy landscape (PEL) sensitively reflects the stability differences through simulation of local structural excitation in a model metallic glass. It is observed that the spectrum of local structural excitation develops a pseudogap at low energies as the glass becomes more stable. We also demonstrate that the spatial variation of the atomic level shear modulus, rather than the distribution of the magnitude of the single atom shear modulus, is more closely related to the nature of the PEL and the stabilities of glasses. In particular, local aggregation of atoms with low shear modulus greatly contributes to instability of the system.
doi_str_mv 10.1103/physreve.89.062313
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Computer Simulation
Copper - chemistry
Elasticity
Glass - chemistry
Kinetics
Metals - chemistry
Models, Chemical
Probability
Shear Strength
Thermodynamics
Zirconium - chemistry
title Evolution of elastic heterogeneity during aging in metallic glasses
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