Strain rate dependent mechanical properties in single crystal nickel nanowires

Abstract

Oxidation induced softening in Al nanowires Appl. Phys. Lett. 102, 051912 (2013) Layer thickness dependent tensile deformation mechanisms in sub-10nm multilayer nanowires J. Appl. Phys. 111, 124313 (2012) A fundamental numerical and theoretical study for the vibrational properties of nanowires J. Appl. Phys. 111, 124303 (2012) Note: Fast and reliable fracture strain extraction technique applied to silicon at nanometer scale Rev. Sci. Instrum. 82, 116106 (2011) Shape memory effects and pseudoelasticity in bcc metallic nanowires

‘Unzipping’ of twin lamella in nanotwinned nickel nanowires under flexural bending

“…Driven by the electrical potential, Ni 2+ in the deposition solution was transported into the AAO channels and being further reduced into Ni atoms. With the confinement of AAO channels, Ni nanowires were finally formed with diameters determined by the channel diameters [43,44]. By tuning the deposition parameters such as temperature, AAO channel size, DC voltage and magnetic field, etc., these particular Ni nanowires with wire-axis-parallel nanotwin structures were successfully fabricated out (see Figure 1).…”

Temperature dependence of irradiation hardening due to dislocation loops and precipitates in RPV steels and model alloys

“…by fitting the curve of strain rate as a function of yield stress, as has been demonstrated for a screw dislocation motion in iron [35]. This problem will require a lot of computational efforts to model defects of different sizes, which is beyond the scope of the present paper.…”

“…To bridge the MD conditions and results with those of mechanical testing, the ratecontrolling deformation mechanism must be understood [34,35]. In the model of thermally activated dislocation motion, its velocity and the corresponding strain rate is given by [34]  …”

Yield strength dependence on strain rate of molybdenum-alloy nanofibers

“…By combining a quantitative in-SEM nanoindenter, e.g., Refs. 9 and 10, and a micromechanical device, [11][12][13][14][15] with a sample preparation method that avoided surface modifications due to FIB milling, 6 the mechanical properties of Mo-alloy nanofibers with different initial dislocation densities were systematically investigated at different displacement rates. The average yield strength and its scatter were found to generally decrease with increasing pre-strain level at all three displacement rates.…”

“…The fibers were then sonicated in order to break and separate them from the residual matrix and dispersed on a titanium-coated silicon wafer for subsequent manipulations onto a micromechanical testing platform. [11][12][13][14][15] Single crystal Mo-alloy nanofibers that were tested in this study all have a h100i growth direction as shown by the example in Figure 1(a). The dislocation densities in these nanofibers at several different pre-strain levels were carefully measured by Phani et al 18 using STEM imaging techniques.…”