Crystallization-induced plasticity of Cu–Zr containing bulk amorphous alloys

Lee, Seok Woo; Huh, Moo Young; Fleury, Éric; Lee, Jae Chul

doi:10.1016/j.actamat.2005.09.007

Cited by 258 publications

(169 citation statements)

References 23 publications

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“…Explanations for the origin of ductility were proposed: (1) a large Poisson's ratio, 3) (2) the presence of heterogeneity and/or short-/medium-range order, 4,5) (3) liquid-liquid phase separation, 6) (4) large free volume, 7,8) (5) introduced porosity, 9,10) (6) introduced in-situ secondary phase 11,12) or ex-situ foreign particles, [13][14][15] and (7) crystallization during deformation. [16][17][18][19] In most cases, improved mechanical properties were achieved by applying one method but little was reported about the synergistic effect of two or more of the factors mentioned above on the development of the mechanical properties of BMGs.…”

Section: Introductionmentioning

confidence: 99%

Tailoring Thermally Induced Nano-Quasicrystallization and Deformation-Assisted Nanocrystallization for Mechanical Property Improvement in Zr-Al-Ni-Cu-Pd Bulk Metallic Glasses

et al. 2009

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The material design tailoring of a synergistic effect of an in-situ nano secondary phase formation and deformation-induced nanocrystallization for improving the mechanical strength and ductility, has been investigated in Zr 65 Al 7:5 Ni 10 Cu 17:5Àx Pd x bulk metallic glasses (BMGs). As-cast Zr 65 Al 7:5 Ni 10 Cu 17:5Àx Pd x (x ¼ 5{17:5) BMGs have significant ductility in compressive deformation, which is attributed to deformation-induced dynamic nanocrystallization. The 10 at% Pd-containing BMG with a low volume fraction of the quasicrystalline (QC) phase of less than 6% exhibits increases in strength and Young's modulus, in addition to a remaining plasticity of $5%, compared with the monolithic glassy alloy. Such improvements in the mechanical properties originate from the combination of two effects of in-situ homogeneous nano-QC formation and deformation-induced inhomogeneous nanocrystallization. The present method should be regarded as a new technique for the production of BMGs with high strength and good ductility.

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Section: Introductionmentioning

confidence: 99%

Tailoring Thermally Induced Nano-Quasicrystallization and Deformation-Assisted Nanocrystallization for Mechanical Property Improvement in Zr-Al-Ni-Cu-Pd Bulk Metallic Glasses

et al. 2009

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“…It has been demonstrated that the formation of a nanocomposite structure, which is prepared by nanocrystallites dispersed in glassy alloys, is an effective method for improving the ductility. [1][2][3][4] The nanocrystalline composites have exhibited excellent mechanical and functional properties which cannot be realized by conventional crystalline materials, nor by single-phase glassy materials. [1][2][3][4] Some glassy-nanocrystalline composites of enhanced ductility have been developed by proper alloying with the elements of non-negative mixing enthalpy with the major component in, for example, Cu-based 5,6) and Zr-based alloys.…”

Section: Introductionmentioning

confidence: 99%

Nanocrystallization of Cu50Zr45Ti5 Metallic Glass Induced by Electron Irradiation

et al. 2006

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The effect of electron irradiation on the structure of melt-spun Cu 50 Zr 45 Ti 5 metallic glass was investigated. Microstructural evolution during electron irradiation was examined by means of conventional and high-resolution transmission electron microscopy (CTEM and HRTEM) equipped with X-ray energy dispersive spectroscopy (EDS). The glassy phase was not stable under electron irradiation and crystalline nanoparticles with the monoclinic CuZr structure were formed. The volume fraction of the nanocrystalline phase increased with the electron dose while the average grain size remained at about 7 nm. This result indicates that electron irradiation is effective in producing nanocrystalline structures from the metallic glass.

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“…Almost all kinds of glassy solids exhibit similar mazelike selected area electron diffraction pattern without any local lattice fringes and broad diffraction maxima characteristic in X-ray diffraction data 14 . However, the glassy solids are inherently different in atomic-level structures, demonstrated by their different response behaviours under certain conditions, for example, the diverse annealing-precipitated crystallinephases [23][24][25] , the distinct mechanical strength and ductility [26][27][28][29][30][31] , and the different thermal stability against crystallization [32][33][34] . Unfortunately, such a difference of inherent structures in glassy solids cannot be easily differentiated from a trivial analysis of the experimental diffraction data.…”

mentioning

confidence: 99%

Hidden topological order and its correlation with glass-forming ability in metallic glasses

Wang

et al. 2015

Nat Commun

116

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Unlike the well-defined long-range periodic order that characterizes crystals, so far the inherent atomic packing mode in glassy solids remains mysterious. Based on molecular dynamics simulations, here we find medium-range atomic packing orders in metallic glasses, which are hidden in the diffraction data in terms of structure factors or pair correlation functions. The analysis of the hidden orders in various metallic glasses indicates that the glassy and crystalline solids share a nontrivial structural homology in short-to-medium range, and the hidden orders are formulated by inheriting partial crystalline orders during glass formation. As the number of chemical components increases, more hidden orders are often developed in a metallic glass and entangled topologically. We use this phenomenon to explain the geometric frustration in glass formation and the glass-forming ability of metallic alloys.

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Crystallization-induced plasticity of Cu–Zr containing bulk amorphous alloys

Cited by 258 publications

References 23 publications

Tailoring Thermally Induced Nano-Quasicrystallization and Deformation-Assisted Nanocrystallization for Mechanical Property Improvement in Zr-Al-Ni-Cu-Pd Bulk Metallic Glasses

Tailoring Thermally Induced Nano-Quasicrystallization and Deformation-Assisted Nanocrystallization for Mechanical Property Improvement in Zr-Al-Ni-Cu-Pd Bulk Metallic Glasses

Nanocrystallization of Cu<SUB>50</SUB>Zr<SUB>45</SUB>Ti<SUB>5</SUB> Metallic Glass Induced by Electron Irradiation

Hidden topological order and its correlation with glass-forming ability in metallic glasses

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