Tungsten solution kinetics and amorphization of nickel in mechanically alloyed NiW alloys

Aning, A.; Wang, Z.; Courtney, T. H.

doi:10.1016/0956-7151(93)90348-v

Cited by 70 publications

(28 citation statements)

References 28 publications

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“…Previous work has shown that W dissolves in the Ni-rich fee phase during MA [9]. This increases its lattice parameter, and the Ni {111} peak shifts to a lower diffraction angle.…”

Section: Results and Discussion I -Milled Powdersmentioning

confidence: 99%

“…Background A few comments on the development of noncrystalline structures in mechanically alloyed Ni-W alloys are in order; details can be found in [9]. Due to mill abrasion, Fe contamination of the powders occurs [11].…”

Section: Crystallization and Thermal Stability Of W-ni-fe Glassy mentioning

confidence: 99%

“…There is no problem in producing glassy WHA powders containing nanometer-sized crystalline W particles. We first did this about ten years ago, employing mechanical alloying (MA) processing [9]. However, powder consolidation is not easy.…”

Section: Introduction and Overviewmentioning

confidence: 99%

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Structure, Properties, and Processing of Two-Phase Crystalline-Amorphous W-Based Alloys

Courtney¹

2000

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“…Previous work has shown that W dissolves in the Ni-rich fee phase during MA [9]. This increases its lattice parameter, and the Ni {111} peak shifts to a lower diffraction angle.…”

Section: Results and Discussion I -Milled Powdersmentioning

confidence: 99%

Section: Crystallization and Thermal Stability Of W-ni-fe Glassy mentioning

confidence: 99%

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Structure, Properties, and Processing of Two-Phase Crystalline-Amorphous W-Based Alloys

Courtney¹

2000

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“…Equation (1) demonstrates that higher frame compliance values leads to lower stiffness. Hence, an important question was whether the loading rate in indentation studies had an effect on the measured frame compliance as this might affect significantly the measured value of material's stiffness.…”

Section: Micro-indentationmentioning

confidence: 96%

“…In contrast, amorphous metal or metallic glasses were first reported only around 1960s. These could be processed using solid-state amorphisation [30] via hydrogen absorption [56,62], mechanical alloying [1], or heat treatment enabling anomalous diffusion in crystalline bi-layers [50]. In 1960, Klement et al [32] fabricated a metallic glass (Au-Si alloy) by rapid quenching from 1300°C to room temperature with high cooling rate of 10 6 Ks À1 [32].…”

Section: Historical Backgroundmentioning

confidence: 99%

Bulk Metallic Glasses: Mechanical Properties and Performance

Nekouie

Abeygunawardane

Roy

2015

Mechanics of Advanced Materials

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In this paper, a history of development of bulk metallic glasses (BMGs) was presented, followed by a review of fundamental mechanisms of their deformation and fracture. In this study, observations of fracture surfaces of the Zr-Cubased BMG exposed to a 3-point test revealed features that are different from those observed in crystalline materials. Indentation techniques were extensively used to characterise elastic deformation of the studied BMG alloy, followed by a systematic analysis of initiation and evolution of shear-band localisation in the indented material. Our results, obtained with the suggested wedge-indentation technique, demonstrated initiation of shear bands in the material volume. This technique can be particularly useful for development of appropriate constitutive models to analyse plastic events in amorphous materials in the small-length scale. A current state of constitutive models of deformation and fracture behaviour of BMGs are presented together with modelling challenges. Simulation of simple tensile and compressive tests were conducted with JH-2, JHB and Drucker-Prager constitutive models by employing identical boundary conditions, type of element and specimen's geometry. Based on the obtained simulation results, the JH-2 model was considered as not suitable for quasi-static analysis due to ambiguity of the data produced with it for uniaxial tensile and compressive conditions. However, it is concluded that the extended Drucker-Prager and JHB models can be used to study deformation modes in BMGs.

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Nanoindentation in Metallic Glasses

Nekouie

Roy

2017

Applied Nanoindentation in Advanced Materials

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Tungsten solution kinetics and amorphization of nickel in mechanically alloyed NiW alloys

Cited by 70 publications

References 28 publications

Structure, Properties, and Processing of Two-Phase Crystalline-Amorphous W-Based Alloys

Structure, Properties, and Processing of Two-Phase Crystalline-Amorphous W-Based Alloys

Bulk Metallic Glasses: Mechanical Properties and Performance

Nanoindentation in Metallic Glasses

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