Fractal in fracture of bulk metallic glass

Jiang, Minqiang; Meng, Jing; Gao, Jia; Wang, Xun-Li; Rouxel, Tanguy; Kéryvin, Vincent; Zhong, Lijuan; Dai, L.H.

doi:10.1016/j.intermet.2010.08.003

Cited by 33 publications

(22 citation statements)

References 34 publications

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“…This transition is usually due to the acceleration of crack propagation in the final stage [45]. It demonstrates that the two patterns have an identical nature of cavitation, as revealed previously [14,19,46].…”

Section: Fracture Surface Morphologysupporting

confidence: 70%

Cryogenic-temperature-induced transition from shear to dilatational failure in metallic glasses

et al. 2014

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Section: Fracture Surface Morphologysupporting

confidence: 70%

Cryogenic-temperature-induced transition from shear to dilatational failure in metallic glasses

et al. 2014

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“…[11][12][13][14][15] Also, no traditional defects can be found in polycrystalline materials such as vacancies, dislocations, grain boundaries, and so on. Instead, free volume 16,17 is thought to be the most common defect, and shear transformation zones (STZs) [18][19][20] and tension transformation zones (TTZs) [21][22][23][24] are the fundamental unit-processes of collective atomic motion in amorphous alloys. Since the damage evolution of spallation is known to be closely related to microstructures and intrinsic defects of materials, the nucleation mechanism of spallation damage in amorphous alloys should have some differences from that of polycrystalline alloys.…”

Section: Introductionmentioning

confidence: 99%

How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?

Huang

Zhong

Zhang

et al. 2011

Journal of Applied Physics

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Transmission electron microscopy of the amorphization of copper indium diselenide by in situ ion irradiation J. Appl. Phys. 111, 053510 (2012) Diffusion-controlled formation mechanism of dual-phase structure during Al induced crystallization of SiGe Appl. Phys. Lett. 100, 071908 (2012) Local structure of nitrogen in N-doped amorphous and crystalline GeTe Appl. Phys. Lett. 100, 061910 (2012) Facile creation of bio-inspired superhydrophobic Ce-based metallic glass surfaces Appl. Phys. Lett. 99, 261905 (2011) Unexpected short-and medium-range atomic structure of sputtered amorphous silicon upon thermal annealing J. Appl. Phys. 110, 096104 (2011) Additional information on J. Appl. Phys. Specially designed plate-impact experiments have been conducted on a Zr-based amorphous alloy using a single-stage light gas gun. To understand the microdamage nucleation process in the material, the samples are subjected to dynamic tensile loadings of identical amplitude ($ 3.18 GPa) but with different durations (83-201 ns). A cellular pattern with an equiaxed shape is observed on the spallation surface, which shows that spallation in the tested amorphous alloy is a typical ductile fracture and that microvoids have been nucleated during the process. Based on the observed fracture morphologies of the spallation surface and free-volume theory, we propose a microvoid nucleation model of bulk amorphous alloys. It is found that nucleation of microvoids at the early stage of spallation in amorphous alloys results from diffusion and coalescence of free volume, and that high mean tensile stress plays a dominant role in microvoid nucleation.

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“…We have investigated the iron-boron based bulk metallic glasses (BMG) development from precursor Fe 40 18 Zr 10, which were processed by different casting techniques enabling different cooling rates. Microstructures studies reveal the homogeneity of the glassy-forming melt in terms of the uniform presence of probable crystalline phases that exhibit a unique morphology for various crystalline phases, a needle, when the critical cooling rate for glass formation was not achieved.…”

Section: Discussionmentioning

confidence: 99%

“…The twisting of the lamellae in this case can be attributed to surface corrugation with predominantly irregular wavelengths corresponding to the measured distances of about 1-3 μm. Corrugations have been observed on fracture surfaces of some BMGs [16][17][18] with wavelength of about 80 nm that are interpreted as energy dissipating mechanism during the fracture. We can assert that the same phenomenon occurs during the solidification of melt, the excess thermal energy would be evacuated via interfaces of strained lamella.…”

Section: Microstructures Of Wedged and Cylindrical Ingots Of Fe 50 Nimentioning

confidence: 99%

Development of Fe-B Based Bulk Metallic Glasses: Morphology of Residual Phases in Fe50Ni16Mo6B18Zr10 Glass

Aboki

2013

Metals

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Iron-boron based bulk metallic glasses (BMG) development has been initiated using Fe 40 Ni 38 Mo 4 B 18 as precursor. Addition of zirconium up to 10 atomic % along with the reduction of Ni proportion improves the glass forming ability (GFA), which is optimum when Ni is suppressed in the alloy. However melting instability occurred during the materials fabrication resulting in the formation of residual crystalline phases closely related to the amorphous phase. Microstructure study shows an evolution from amorphous structure to peculiar acicular structure, particularly for Fe 50 Ni 16 Mo 6 B 18 Zr 10 , suggesting the amorphous structure as interconnected atomic sheets like "atomic mille feuilles" whose growth affects the alloys' GFA.

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Fractal in fracture of bulk metallic glass

Cited by 33 publications

References 34 publications

Cryogenic-temperature-induced transition from shear to dilatational failure in metallic glasses

Cryogenic-temperature-induced transition from shear to dilatational failure in metallic glasses

How does spallation microdamage nucleate in bulk amorphous alloys under shock loading?

Development of Fe-B Based Bulk Metallic Glasses: Morphology of Residual Phases in Fe50Ni16Mo6B18Zr10 Glass

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