Shear fracture and fragmentation mechanisms of bulk metallic glasses

Zhang, Z. F.; Zhang, Haiyan; Shen, Baolong; Inoue, Akihisa; Eckert, J.

doi:10.1080/09500830600949602

Cited by 71 publications

(44 citation statements)

References 31 publications

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“…Moreover, different from the shear mode of the ductile BMGs, the brittle Cu 40 Zr 40 Al 10 Ag 10 glassy sample finally failed into a lot of pieces under compressive loading, which also shows that the catastrophic split of the ''weak'' atomic pairs leads to the failure of the glassy alloys. As consistent with our results, Zhang's work 17) also demonstrated that the fracture mode of the BMGs was related with the surface energy or bonding strength of the atomic pairs.…”

Section: Discussionsupporting

confidence: 80%

Transition from Plasticity to Brittleness in Cu-Zr-Based Bulk Metallic Glasses

Zhang

Inoue

2007

Mater. Trans.

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The effects of addition of Al and Ag on the mechanical properties of the Cu 50 Zr 50 alloy are investigated. It is found that the plasticity of the Cu-Zr-based BMGs decreases as the content of the alloying elements of Al and Ag increases. A clear transition from plasticity to brittleness occurs for the Cu-Zr-based BMGs with increasing the content of Al and Ag. Combining with previous work on the plasticity or brittleness of the Cu-Zr-based BMGs, the role of the atomic binding force between the solute and solvent atoms is suggested to understand the transition from plasticity to brittleness for the Cu-Zr-based BMGs.

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Section: Discussionsupporting

confidence: 80%

Transition from Plasticity to Brittleness in Cu-Zr-Based Bulk Metallic Glasses

Zhang

Inoue

2007

Mater. Trans.

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“…The form of prepared cylindric ingots is shown in The elastic energy δ E density stored in a BMG sample upon the failure can be expressed according to [12]: The corrugations are oriented perpendicular to the crack tip propagation direction.…”

Section: Resultsmentioning

confidence: 99%

Fragmentation of Co-Fe-Ta-B Soft Magnetic Amorphous Alloy

et al. 2015

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The main limitation of high-strength Co-based bulk metallic glasses for their application as structural materials is the large brittleness. Spontaneously emerging cracks in the alloy degrade the magnetic properties. We analyzed the failure characteristics of Co43Fe20Ta5.5B31.5 bulk soft magnetic metallic glass deformed in the compression at room temperature and the low strain rate. Under loading the amorphous structure stores high elastic energy. During the failure this energy is released and the alloy breaks into small particles or powder exhibiting a fragmentation mode.

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“…However, some intrinsically brittle BMGs, for example, Co-or Mg-based BMGs, often break into many small particles or powders under compression even with a very small aspect ratio. 30 The intrinsically brittle or ductile failure can be attributed to difference in the parameter ␣ ‫ס‬ 0 / 0 for different BMGs, which has been discussed elsewhere. 30,31 …”

Section: Discussionmentioning

confidence: 99%

“…30 The intrinsically brittle or ductile failure can be attributed to difference in the parameter ␣ ‫ס‬ 0 / 0 for different BMGs, which has been discussed elsewhere. 30,31 …”

Section: Discussionmentioning

confidence: 99%

Compressive properties of bulk metallic glass with small aspect ratio

Zhang

Mao

2007

J. Mater. Res.

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The quasi-static compressive deformation behavior of a Vitreloy 1 bulk metallic glass (BMG) with an aspect ratio of 0.25 was investigated. It is found that the friction and the confinement at the specimen-loading platen interface will cause the dramatic increase in the compressive load, leading to higher compressive strength. In particular, the BMG specimens show great plastic-deformation ability, and plenty of interacted, deflected, wavy, or branched shear bands were observed on the surfaces after plastic deformation. The formation of the strongly interacted, deflected, wavy, or branched shear bands can be attributed to the triaxial stress state in the glassy specimens with a very small aspect ratio.

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Shear fracture and fragmentation mechanisms of bulk metallic glasses

Cited by 71 publications

References 31 publications

Transition from Plasticity to Brittleness in Cu-Zr-Based Bulk Metallic Glasses

Transition from Plasticity to Brittleness in Cu-Zr-Based Bulk Metallic Glasses

Fragmentation of Co-Fe-Ta-B Soft Magnetic Amorphous Alloy

Compressive properties of bulk metallic glass with small aspect ratio

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