Deformation behavior of Zr-based bulk nanocrystalline amorphous alloys

Fan, Chenglei; Li, Chunfei; Inoue, Akihisa; Haas, Volker

doi:10.1103/physrevb.61.r3761

Cited by 166 publications

(88 citation statements)

References 9 publications

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“…7) Unlike the relatively large Ta-rich particles in the Ta-particle/BMGC, in the nano/BMGC, the size of nanocrystals contained at the 27% V f are only 1 to 3 nm. 5,6) Such small particles cannot absorb propagating shear bands, but can result in a nonuniform stress distribution inside the sample (i.e., stress concentration). The presence of nanocrystals can lead to increases in viscosity as well that could facilitate the formation of a greater number of shear bands.…”

Section: Resultsmentioning

confidence: 99%

“…In amorphous alloys and some of nanocrystalline alloys (and some of ultra-fine grained materials), the initiation and propagation behaviors of shear bands are an important part of the deformation and failure mechanism. [1][2][3][4][5][6][7][8] The grain-rotational phenomena, associated with the dislocation motion in nanostructures, and grain boundary sliding are often used to describe the deformation mechanisms in ultrafine-and nanometer-grain-sized materials. 1,2) At the same time, the free-volume theory is evoked to interpret the initiation and propagation of shear bands in metallic glasses, which have the narrowest observed thicknesses of about 20 nm.…”

Section: Introductionmentioning

confidence: 99%

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Shear-Band Deformation in Amorphous Alloys and Composites

et al. 2006

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The deformation of monolithic bulk-metallic glasses (BMGs), nanocrystal-containing, and micrometer-sized, ductile-particle-reinforced bulk metallic glass composites (BMGCs) has been investigated. The number density of shear bands, the interaction of shear bands with the particles, as well as the apparent plasticity was found to be significantly different in three types of samples before failure occurred. The interaction of shear bands with the micrometer-sized particles implied that shear bands can be initiated by stress concentration at the particle boundaries and, at the same time, absorbed by the deformation of particles. It is hypothesized that the observed number density and motion of shear bands could arise from the interaction of rotational sliding of medium range order (MRO) or dense-packed clusters, fine crystals, and the free volume in the material. An estimate of the shear band thickness, based on the size of particles or grains near and in the shear bands of the BMGs, BMGCs, and ultra-fine structured materials is consistent with this conjecture.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Shear-Band Deformation in Amorphous Alloys and Composites

et al. 2006

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“…For example, early work by Inoue and co-workers [54] obtained nanocomposites by annealing a glassy precursor and improved the plasticity by up to 2.5% in compression. Subsequently, work done by in situ precipitating out ductile dendritic crystalline phases during solidification from the melt also produced BMGCs exhibiting significant ductility.…”

Section: Selected Mechanical Properties Of In Situ Bmgcsmentioning

confidence: 99%

Recent developments in ductile bulk metallic glass composites

et al. 2013

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Offering a unique suite of mechanical, physical, and chemical properties, bulk metallic glasses (BMGs) show significant promise as engineering materials. Unfortunately, most BMGs exhibit low tensile ductility at ambient temperature that limits their use as structural (load-bearing) materials. To overcome this problem, BMG composites (BMGCs) containing a second phase are being developed for improving ductility by controlling the mechanics of shear band nucleation and growth in the glassy matrix, which is the primary mode of failure in these materials. This review describes some recent developments in BMGCs and discusses the influence of the type of second phase on mechanical behavior.

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“…Fan et al [10][11] found Zr53Ti5Ni10Cu20Al12 and Zr60Cu20Pd10Al10 have good plasticity at room temperature, and the nanocrystalline's exist in amorphous matrix by high resolution electron microscopy (sem), thus forming nanocrystalline-Zr base amorphous composite materials. The composite material has macroplasticity which due to stress con- centration near the nanocrystalline, which leads to the generation of multiple shear zone and the single shear zone's difficulty to expand rapidly [12].…”

Section: 1mentioning

confidence: 99%

The Research Progress of Zr Based Amorphous Composite Materials

Kong

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Based on the introduction and forms of the second phase the Zr based amorphous composites was classified.This paper introduced the research work of the endogenous phase-Zr based amorphous composite materials, the particles-Zr based amorphous composites, fiber-Zr based amorphous composite materials, the skeleton-Zr based amorphous composite materials, and prospected the development prospect of Zr based amorphous composites.

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Deformation behavior of Zr-based bulk nanocrystalline amorphous alloys

Cited by 166 publications

References 9 publications

Shear-Band Deformation in Amorphous Alloys and Composites

Shear-Band Deformation in Amorphous Alloys and Composites

Recent developments in ductile bulk metallic glass composites

The Research Progress of Zr Based Amorphous Composite Materials

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