Inhomogeneous flow via dislocations in metallic glasses: a survey of experimental evidence

Bobrov, O. P.; Khonik, V. A.

doi:10.1016/0022-3093(95)00414-9

Cited by 8 publications

(2 citation statements)

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“…Because of the deformation-assisted activation of free-volume sites, atomic structure inside the slip band is believed to be different from that outside the sharp shear band region, i.e., there is structural transformation or metastable structure inside the shear band (Zielinski and Ast, 1983). Many experiments have revealed the structure anomaly of shear band in both microscopic and macroscopic scales (Anand, 1984;Argon et al, 1985;Bobrov and Khonik, 1995). For example, after the metallic glass ribbon is bent, the re-bent specimen exhibits shear bands in the initial shear bands.…”

Section: Simulation Methods For Deformations and Fractures Of Bmg Andmentioning

confidence: 98%

Simulation of crack propagation in fiber-reinforced bulk metallic glasses

Zheng

Shen

2010

International Journal of Solids and Structures

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a b s t r a c tBased on a phase-field model for deformation in bulk metallic glasses (BMGs), shear band formation and crack propagation in the fiber-reinforced BMG are investigated. Ideal unbroken fibers embedded in the BMG matrix are found to significantly influence the shear banding and crack propagation in the matrix. The crack propagation affected by fibers' length and orientation is quantitatively characterized and is described by micromechanics models for composite materials. Furthermore, fractures in some practical fiber-reinforced BMG composites such as tungsten-reinforced Zr-based BMG are simulated. The relation between the enhanced fracture toughness and the mechanical properties of fiber reinforcements is determined. Different fracture modes of BMG-matrix composites are identified from the systematic simulation studies, which are found to be consistent with experiments. The simulation results suggest that the phase-field modeling approach could be a useful tool to assist the fabrication and design of BMG composites with high fracture toughness and ductility.

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Section: Simulation Methods For Deformations and Fractures Of Bmg Andmentioning

confidence: 98%

Simulation of crack propagation in fiber-reinforced bulk metallic glasses

Zheng

Shen

2010

International Journal of Solids and Structures

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“…Effect of Plastic Deformation. Plastic strains ε pl of up to 20 % could be introduced by cold rolling of the bulk specimens (at room temperature), in an attempt to check the dislocation concept [26]. As shown in Fig.…”

Section: Solid State Phenomena Vol 115mentioning

confidence: 99%

Comparing Irreversible and Reversible Structural Relaxation in Bulk and Ribbon Metallic Glasses Zr52.5Ti5Cu17.9Ni14.6Al10 and Pd40Cu30Ni10P20 by Mechanical Spectroscopy

Eggers

Khonik

Neuhäuser

2006

SSP

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By means of the vibrating reed technique, measurements of internal friction have been performed in the temperature range of 120 K < T < Tg (= glass temperature) on two amorphous alloys, each produced as ribbon and bulk material. The different contents of free volume result in an only slight shift of the onset of irreversible structural relaxation to lower temperatures (i.e., lower activation energies) for the ribbons, while considerably different amounts of structural relaxation occur. After correcting for the thermoelastic effect, the reversible structural relaxation, i.e., an approximately exponential increase of damping with rising temperature, is well described by KWW kinetics (β ≈ 0.3). For the Zr-based alloy only, a clear relaxation peak occurs in the range from 270 K to 320 K (for the first flexural vibration mode between 100 Hz and 400 Hz) induced by hydrogenation. In addition, the effect of plastic deformation on the damping behavior by cold rolling of the bulk materials has been examined.

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The-State-of-the-Art of Nanostructured High Melting Point Compound-Based Materials

Andrievski

1998

Nanostructured Materials

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Inhomogeneous flow via dislocations in metallic glasses: a survey of experimental evidence

Cited by 8 publications

References 10 publications

Simulation of crack propagation in fiber-reinforced bulk metallic glasses

Simulation of crack propagation in fiber-reinforced bulk metallic glasses

Comparing Irreversible and Reversible Structural Relaxation in Bulk and Ribbon Metallic Glasses Zr<sub>52.5</sub>Ti<sub>5</sub>Cu<sub>17.9</sub>Ni<sub>14.6</sub>Al<sub>10</sub> and Pd40Cu30Ni10P20 by Mechanical Spectroscopy

The-State-of-the-Art of Nanostructured High Melting Point Compound-Based Materials

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