Atomic arrangement in CuZr-based metallic glass composites under tensile deformation

Hao, Huali; Zhou, Wentao; Lü, Yang; Lau, Denvid

doi:10.1039/c9cp04914b

Cited by 21 publications

(8 citation statements)

References 59 publications

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“…A few shear transformation zones (STZs) could be activated with increasing strain, serving as the nucleation sites for shear bands [21]. The presence of these STZs significantly disturbed the original strain field, making it displace preferentially on the plane with the maximum shear stress [22]. Thus, the following STZs along the plane with maximum shear stress would be activated more easily than other regions.…”

Section: Discussionmentioning

confidence: 99%

“…In this scenario, many STZs are progressively activated, stimulating new strain fields to generate accordingly. These new strain fields do not induce the deflection of the atoms around the STZs migrating along the maximum shear stress but prefer to move along the different shear planes [22]. Moreover, in the hard regions, a further densification of atomic packing would further alter the propagation directions and facilitates shear bands multiplication, exhibiting a typical pattern of formation of multiple shear bands (Fig.…”

Section: Discussionmentioning

confidence: 99%

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Improved tensile plasticity of bulk metallic glasses by heightening microstructural heterogeneity and energy state

Ma¹,

Mei²,

Cui³

et al. 2021

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Bulk metallic glasses (BMGs) generally fail in a brittle manner at room temperature upon uniaxial tensile loading. In the present work, we disclose that high microstructural heterogeneity fabricated in high energy glass could obviously enhance the macroscopic tensile plasticity of BMGs. Such a unique structure can promote the lower formation energy and the dificulty to propagate shear bands, resulting in detectable yielding and certain tensile plasticity. This work may widen the pathway to overcoming the brittleness and is believed to aid in structural application of BMGs greatly. K e y w o r d s : bulk metallic glasses, tensile plasticity, high energy, microstructural heterogeneity

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Improved tensile plasticity of bulk metallic glasses by heightening microstructural heterogeneity and energy state

Ma¹,

Mei²,

Cui³

et al. 2021

View full text Add to dashboard Cite

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“…It is hoped that an accurate forcefield can be developed and validated to represent the interaction based on regular processes [ 102 , 103 ]. After obtaining an accurate forcefield that can be applied to the studied system, information about molecular dynamics such as diffusion coefficient [ 104 ] and movement pathway [ 105 ], and molecular interaction such as radial distribution function [ 106 ] and adhesion energy [ 107 ], will become obtainable, as presented in Figure 4 b. These molecular behavior indicators are then evaluated and transferred to link macroscopic information in order to interpret the corrosion behaviors of aluminum windows.…”

Section: Future Outlookmentioning

confidence: 99%

Deterioration Mechanisms and Advanced Inspection Technologies of Aluminum Windows

2022

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Aluminum windows are crucial components of building envelopes since they connect the indoor space to the external environment. Various external causes degrade or harm the functioning of aluminum windows. In this regard, inspecting the performance of aluminum windows is a necessary task to keep buildings healthy. This review illustrates the deterioration mechanisms of aluminum windows under various environmental conditions with an intention to provide comprehensive information for developing damage protection and inspection technologies. The illustrations reveal that moisture and chloride ions have the most detrimental effect on deteriorating aluminum windows in the long run, while mechanical loads can damage aluminum windows in a sudden manner. In addition, multiple advanced inspection techniques potential to benefit assessing aluminum window health state are discussed in order to help tackle the efficiency problem of traditional visual inspection. The comparison among those techniques demonstrates that infrared thermography can help acquire a preliminary defect profile of inspected windows, whereas ultrasonic phased arrays technology demonstrates a high level of competency in analyzing comprehensive defect information. This review also discusses the challenges in the scarcity of nanoscale corrosion information for insightful understandings of aluminum window corrosion and reliable window inspection tools for lifespan prediction. In this regard, molecular dynamics simulation and artificial intelligence technology are recommended as promising tools for better revealing the deterioration mechanisms and advancing inspection techniques, respectively, for future directions. It is envisioned that this paper will help upgrade the aluminum window inspection scheme and contribute to driving the construction of intelligent and safe cities.

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“…It is important to achieve a better understanding of the molecular structures and intermolecular associations of asphalt materials [28]. The emergence of molecular dynamics (MD) simulations not only contributes to the development of bottom-up modeling but also provides inspiration for the design of construction materials [29][30][31][32][33][34][35]. The modeling scheme that uses MD simulations studies the atomistic movements and the evolution of nanostructures in material systems, which can provide an in-depth understanding of the underlying mechanism that governs the macroscopic behaviors of asphalt materials.…”

Section: Research Work For Asphalt Materials Begins At the Macromentioning

confidence: 99%

A Review on Multiscale Modeling of Asphalt: Development and Applications

Nie

Chow

Lau

2022

Multiscale Sci. Eng.

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Modeling is an important approach for describing the physical and mechanical properties of asphalt, which can be employed to analyze the properties and optimize the performance of asphalt-based materials. The objective of this review is to elucidate the existing modeling techniques from different scales and summarize the prospects and application of different modeling methods. The continuum model and its practical application at the macroscale are introduced first. However, the macroscopic model cannot explain the roles of the different components in asphalt during the degradation process. The microstructural model at the mesoscale is adopted in order to describe the physical properties of the asphalt mixture, and different numerical methods are presented in order to analyze the microstructural models. Due to the heterogeneous nature of asphalt at the nanoscale, various experimental tools have been used to determine the molecular structures of asphalt. The average model and multi-component model have been proposed in the molecular dynamics simulations. This paper provides a clear understanding of the strength and limitations of each modeling technology at different scales and the applications of multiscale modeling for asphalt materials. The possible challenges of asphalt modeling have been addressed in order to encourage the development of asphalt pavement with higher durability.

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Atomic arrangement in CuZr-based metallic glass composites under tensile deformation

Abstract: B2 phase prevents the vortexlike motion of amorphous matrix around STZs avoiding forming of domain shear band.

Cited by 21 publications

References 59 publications

Improved tensile plasticity of bulk metallic glasses by heightening microstructural heterogeneity and energy state

Improved tensile plasticity of bulk metallic glasses by heightening microstructural heterogeneity and energy state

Deterioration Mechanisms and Advanced Inspection Technologies of Aluminum Windows

A Review on Multiscale Modeling of Asphalt: Development and Applications

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