Plasticity of nanostructured Cu–Nb-based wires: Strengthening mechanisms revealed by in situ deformation under neutrons

Vidal, Vanessa; Thilly, L.; Petegem, S. Van; Stuhr, U.; Lecouturier, Florence; Renault, P.-O.; Swygenhoven, H. Van

doi:10.1016/j.scriptamat.2008.09.032

Cited by 44 publications

(28 citation statements)

References 4 publications

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“…The lattice strain of Nb nanowires in composite during tensile deformation is maximally as high as 6.5 % [11]. It is suggested that such high strength of the nanowires is derived from the perfect alignment in composite as well as their intrinsic single-crystalline feature, which is in accordance with the reported mechanical properties of freestanding single-crystalline nanowires [5][6][7][8][9].…”

Section: Methodssupporting

confidence: 65%

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Morphology evolution and crystallographic feature of Nb nanowire in an in-situ NiTi-Nb nanocomposite

et al. 2014

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In-situ NiTi shape memory alloy-Nb nanowire nanocomposite was revealed to exhibit exceptional mechanical properties. The properties of high strength and ultra-large elastic strains are closely related with the high performance of in situ-formed Nb nanowire reinforcements. In this study, the morphology evolution and crystallographic feature of Nb nanowires in NiTi shape memory alloy matrix during cold drawing were investigated by means of transmission electron microscopy (TEM). It is revealed that, as a result of the severe work hardening and amorphization of NiTi matrix, the cold work reduction of nanowire reinforcements can exceed that of the entire composite. The irregular-shaped Nb nanowires are reshaped to straight and smooth nanowires during cold drawing process. By means of TEM nanobeam diffraction, it is revealed that the in situ-formed Nb nanowire in such top-down processed NiTi-Nb composite keeps single crystalline over 1,000 nm at length direction. As a consequence, the aspect ratio of nanowire reinforcements in NiTi matrix exceeds 25:1.

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Section: Methodssupporting

confidence: 65%

“…Given this, it is a profound designing strategy that incorporates nanowires into metal matrix to harness the exceptional mechanical properties of the nanowires in bulk forms [5][6][7][8][9]. NiTi shape memory draws considerable attentions, when acting as functional metal matrix in the fabrication of novel composite materials [10].…”

Section: Introductionmentioning

confidence: 99%

Morphology evolution and crystallographic feature of Nb nanowire in an in-situ NiTi-Nb nanocomposite

et al. 2014

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“…This large elastic strain is comparable to those of freestanding nanowires and much larger than those of the nanowires embedded in metal matrices deforming by dislocation slip (~1.5%) ( Figure S3). 19,20 To determine that the large tensile elastic strain of the Nb nanowires can be retained in the composite after unloading, in situ synchrotron X-ray diffraction was performed on the composite through multiple-step tensile deformation cycles, as shown in Figure 3a. Evolution of X-ray diffraction peaks for Nb (110) and B19'-NiTi (001) planes through the deformation cycles is shown in Figure 3b.…”

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confidence: 99%

Retaining Large and Adjustable Elastic Strains of Kilogram-Scale Nb Nanowires

Hao

Cui

Wang

et al. 2016

ACS Appl. Mater. Interfaces

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Individual metallic nanowires can sustain ultralarge elastic strains of 4-7%. However, achieving and retaining elastic strains of such magnitude in kilogram-scale nanowires are challenging. Here, we find that under active load, ∼ 5.6% elastic strain can be achieved in Nb nanowires embedded in a metallic matrix deforming by detwinning. Moreover, large tensile (2.8%) and compressive (-2.4%) elastic strains can be retained in kilogram-scale Nb nanowires when the external load was fully removed, and adjustable in magnitude by processing control. It is then demonstrated that the retained tensile elastic strains of Nb nanowires can increase their superconducting transition temperature and critical magnetic field, in comparison with the unstrained original material. This study opens new avenues for retaining large and tunable elastic strains in great quantities of nanowires and elastic-strain-engineering at industrial scale.

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“…The patterns are fully indexed to B2-NiTi and bcc-Nb. The bcc-Nb diffractions assemble highly broken rings and appear only at a few localized spots, implying strong wire texture of the Nb nanowires resulting from the severe drawing process [14]. The texture orientation is Nb [110] parallel to the wire axial direction.…”

Section: Methodsmentioning

confidence: 99%

Influence of internal stress coupling on the deformation behavior of NiTi–Nb nanowire composites

et al. 2014

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This study investigated the effect of internal stress coupling on the deformation behavior of a NiTi matrix-Nb nanowire composite. It is found that residual internal stresses between the nanowires and matrix was created due to the mismatch between the elastic recovery strain of the Nb nanowires and the phase transformation strain of the NiTi matrix. These internal stresses affect the deformation behavior in subsequent deformation cycles, and the effect is dependent on the volume fraction of the nanowires.

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Plasticity of nanostructured Cu–Nb-based wires: Strengthening mechanisms revealed by in situ deformation under neutrons

Cited by 44 publications

References 4 publications

Morphology evolution and crystallographic feature of Nb nanowire in an in-situ NiTi-Nb nanocomposite

Morphology evolution and crystallographic feature of Nb nanowire in an in-situ NiTi-Nb nanocomposite

Retaining Large and Adjustable Elastic Strains of Kilogram-Scale Nb Nanowires

Influence of internal stress coupling on the deformation behavior of NiTi–Nb nanowire composites

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