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A systematic investigation of the shear band evolution and hardness change with deformation was performed on cold-rolled Zr 64.13 Cu 15.75 Ni 10.12 Al 10 and Zr 46.5 Cu 45 Al 7 Ti 1.5 bulk metallic glasses. It was found that primary shear bands reach saturation after 7% in thickness reduction and only primary shear bands exist below 20% in thickness reduction, based on statistical analyses of primary shear band spacing, angle and offset. Rolling creates more free volume, and deformation-induced residual stress distribution in a heavily rolled specimen relative to the as-cast specimen has been determined. Larger tensile residual stresses are generated on the side surface as compared with those on the top surface, while compressive residual stresses in the middle are induced. Such residual stresses strongly influence the hardness measured. It is also revealed that after stress relief, the hardness does not decrease considerably in heavily rolled/annealed specimens here as compared to as-cast/annealed specimens, probably due to low shear band density.

Based on the observations of scanning electron microscopy and transmission electron microscopy, four kinds of carbides were identified in a Nb-microalloyed steel after quenching–partitioning–tempering treatment. In addition to transitional epsilon carbide that usually forms in silicon-free carbon steel, other three types of niobium carbides (NbC) formed at various treatment stages respectively. They are incoherent NbC inclusion that nucleated at solidification mainly, fine NbC that nucleated in lath martensite at tempering stage and regular polygonal NbC that nucleated in austenite before quenching. Their formation mechanisms on steel were discussed briefly based on thermodynamics.

A low-temperature solar Rankine system utilizing R245fa as the working fluid is proposed and an experimental system is designed, constructed and tested. Both the evacuated solar collectors and the flat plate solar collectors are used in the experimental system, meanwhile, a rolling-piston R245fa expander is also mounted in the system. The new designed R245fa expander works stably in the experiment, with an average expansion power output of 1.73 kW and an average isentropic efficiency of 45.2%. The overall power generation efficiency estimated is 4.2%, when the evacuated solar collector is utilized in the system, and with the condition of flat plate solar collector, it is about 3.2%. The experimental results show that using R245fa as working fluid in the low-temperature solar power Rankine cycle system is feasible and the performance is acceptable.

This paper will discuss the design and construction of BESIII, which is designed to study physics in the tau-charm energy region utilizing the new high luminosity BEPCII double ring e+e- collider. The expected performance will be given based on Monte Carlo simulations and results of cosmic ray and beam tests. In BESIII, tracking and momentum measurements for charged particles are made by a cylindrical multilayer drift chamber in a 1 T superconducting solenoid. Charged particles are identified with a time-of-flight system based on plastic scintillators in conjunction with dE/dx (energy loss per unit pathlength) measurements in the drift chamber. Energies of electromagnetic showers are measured by a CsI(Tl) crystal calorimeter located inside the solenoid magnet. Muons are identified by arrays of resistive plate chambers in the steel magnetic flux return. The level 1 trigger system, Data Acquisition system and the event filter system based on networked computers will also be described., 57 pages, 75 figures

Bulk Zr64.13Cu15.75Ni10.12Al10 metallic glass has been rolled at room temperature in two different directions, and the dependences of microstructure and tensile mechanical property on the degree of deformation and rolling directions have been investigated. No deformation-induced crystallization occurs except for shear bands. Shear band formation in conjugated directions is achieved in the specimen rolled in two directions, while rolling in one direction induces shear band formation only in a single direction. Pre-existing properly spaced soft inhomogeneities can stabilize shear bands and lead to tensile plastic strain, and the efficient intersection of shear bands in conjugated directions results in work-hardening behavior, which is further confirmed by in situ tensile scanning electron microscopic observation. Based on the experimental results obtained in two different specimen geometries and finite element analysis, it is deduced that a normal-stress-modified maximum shear stress criterion rather than a shear plane criterion can describe the conditions for the formation of shear bands in uniaxial tension.

Local atomic structures at glassy, supercooled liquid, and liquid states for La-based bulk metallic glasses (BMGs) have been investigated by in-situ high-temperature X-ray diffraction. It is found that the coordination number of about 15.1 ± 0.1 for the La62Al14Cu11.7Ag2.3Ni5Co5 alloy does not depend on temperature up to liquid temperature, while it decreases slightly with temperature for the La62Al14Cu24 and La62Al14Cu20Ag4 alloys. The S(q) data recorded at the supercooled liquid region can be well described by the Debye theory. For the three alloys, the volume expansion coefficient and the slopes of radii variation for the first to third nearest neighboring coordination shells show differences at glassy-to-supercooled liquid transition, while no obvious changes were detected at supercooled liquid-to-liquid transition for them. The linear expansion coefficient value (β = 1.6 ± 0.1 × 10–5 K–1) below the glass transition temperature deduced from S(q) data is consistent with that detected by the dilatometer (β = 1.25 × 10–5 K–1) for the La62Al14Cu11.7Ag2.3Ni5Co5 BMG.

Using extended X-ray absorption fine structure, the origin of high glass forming ability (GFA) for the ternary Fe–Y–B system has been successfully correlated with local atomic structure. It is confirmed that the incorporation of minor large-sized Y atoms promotes the formation of complex B 6 (Fe,Y) 23 phase, compared with Fe 3 B phase in the Fe–B binary alloy. With further addition of Y (up to 6 at.%), excessive internal strain leads to the distortion of B 6 (Fe,Y) 23 -like phase and eventually favors the formation of amorphous state during solidification. Consequently, GFA increases from 0.025 mm Fe 78 B 22 thin ribbon to 2 mm Fe 72 Y 6 B 22 rod.

Nd:LuAG (Nd:Lu3Al5O12) crystal was grown by the Czochralski method. X-ray powder diffraction experiments show that the Nd:LuAG crystal crystallizes in the cubic with space group Ia3d and has the cell parameter: a = 1.1907 nm, V = 1.6882 nm3. The absorption and fluorescence spectra of Nd:LuAG crystal at room temperature were investigated. With a fiber-coupled diode laser as pump source, the continuous-wave (CW) laser action of Nd:LuAG crystal was demonstrated. The maximum output power at 1064 nm was obtained to be 3.8 W under the incident pump power of 17.3 W, with the optical conversion efficiency 22.0% and the slope efficiency 25.7%.

We present mechanical properties of monolithic bulk metallic glass (BMG) Zr 62 Al 8 Ni 13 Cu 17 under uniaxial compression and tensile tests. It is found that the Zr 62 Al 8 Ni 13 Cu 17 BMG exhibits pronounced plasticity of nearly 14% without catastrophic failure upon compression. However, it is destroyed under tension in a brittle manner. High energy X-ray diffraction has been used to detect the structural change in this BMG during both conditions. No deformation-induced nanocrystallization is detected in a 55% strained sample under compression while it only appears in the fracture-affected region upon tension. No excess free volume is obviously found in the fractured samples. We suggest that monolithic BMG alloys with small differences in atomic affinity and atomic sizes among components might have high plasticity under compression.

By employing discrete stationary wavelet transform (SWT), generalised cross-validation (GCV), genetic algorithm (GA), and non-linear gain operator, an efficient de-noising and enhancement algorithm for typhoon cloud image is proposed. Having implemented SWT to a typhoon cloud image, noise in a typhoon cloud image is reduced by modifying the stationary wavelet coefficients using GA and GCV at fine resolution levels. Asymptotical optimal de-noising threshold can be obtained, without knowing the variance of noise, by only employing the known input image data. GA and non-linear gain operator are used to modify the stationary wavelet coefficients at coarse resolution levels in order to enhance the details of a typhoon cloud image. Experimental results show that the proposed algorithm can efficiently reduce the speckle in a typhoon cloud image while well enhancing the detail. In order to accurately assess an enhanced typhoon cloud image's quality, an overall score index is proposed based on information entropy, contrast measure and peak signal-noise-ratio (PSNR). Finally, comparisons between the proposed algorithm and other similar methods, which are proposed based on discrete wavelet transform, are carried out.

This paper presents the analysis of low-temperature solar Rankine cycles for power generation using zeotropic mixtures. Three typical mass fractions 0.9/0.1 (Ma) 0.65/0.35 (Mb), 0.45/0.55 (Mc) of R245fa/R152a are chosen. In the proposed temperature range from 25 °C to 85 °C, the three zeotropic mixtures are investigated as the working fluids of the low-temperature solar Rankine cycle. Because there is an obvious temperature glide during phase change for zeotropic mixtures, an internal heat exchanger (IHE) is introduced to the Rankine cycle. Investigation shows that different from the pure fluids, among the proposed zeotropic mixtures, the isentropic working fluid Mb possesses the lowest Rankine cycle efficiency. For zeotropic mixtures a significant increase of thermal efficiencies can be gained when superheating is combined with IHE. It is also indicated that utilizing zeotropic mixtures can extend the range of choosing working fluids for low-temperature solar Rankine cycles.

There is an urgent requirement for better combination of high strength and adequate toughness of steels to meet the demand of industrial applications. The present study shows that an Fe–0.2C–1.5Mn–1.5Si–0.05Nb–0.13Mo steel subjected to quenching–partitioning–tempering (Q–P–T) process based upon modifying the recently developed Q&P treatment by Speer et al. exhibits high-tensile strength (1500 MPa) and relatively high elongation (15%), therefore, Q–P–T steels have become a novel group of advanced high-strength steels. The origin of such excellent mechanical properties was revealed by characterization of microstructure.

An anomalous glass transition was detected in differential scanning calorimetry (DSC) curves for Fe–M–Y–B (M = Mo, W, Nb) bulk metallic glasses, which has been investigated by DSC, X-ray diffraction and extended X-ray absorption fine structure. It is confirmed that the second inflection event in the supercooled liquid region is not a real glass transition, but rather a local atomic structure reordering, which is mainly caused by the strong affinity between B and other constituent elements as well as the repulsive interaction between M and Y.

A modified heat treatment process designated quenching–partitioning–tempering (Q–P–T) process is developed based on the quenching and partitioning process proposed by J.G. Speer et al. [Acta Mater.51, 2611 (2003)] and D.K. Matlock et al. [Mater. Sci. Forum426–432, 1089 (2003)]. A Fe–0.485C–1.195Mn–1.185Si–0.98Ni–0.21Nb steel after Q–P–T process satisfies the designed requirement of tensile strength over 2000 MPa and elongation over 10%. The microstructure characterization indicates that this ultrahigh-strength steel consists of nanomicrostructures including lath martensite, filmlike retained austenite, and dispersive Nb-containing carbides. The effect of tempering time on the mechanical properties is analyzed based on microstructures.

The microstructures of an Fe–20Mn–2Si–2Al Twinning-Induced Plasticity (TWIP) steel deformed at different temperature were characterized by X-ray Diffraction (XRD) and Transmission Electron Microscopy (TEM). Based on microstructural features revealed at various characteristic temperature regions of deformation, the necessary and sufficient conditions of TWIP effect are proposed. Likewise, the competitive characteristic deformation mechanism occurring in this TWIP steel is presented and discussed qualitatively in terms of phase stability and stacking fault energy of the austenitic matrix.

The effect of the fourth element on glass-forming ability (GFA) in Ni–Nb–Zr–X (X = Ti, Ta, Fe, Cu, Co, V, Y, Mo, Sn, Al, Si) bulk metallic glass (BMG) system has been studied. Among these elements, Co addition can increase GFA of the Ni–Nb–Zr BMG system. The best glass former is Ni 57 Nb 33 Zr 5 Co 5 alloy with a critical diameter of 3.5 mm. The corrosion rate of this alloy is approximately one order of magnitude less than that of the stainless steel in aggressive 6 M HCl open to air at room temperature. This alloy exhibits high T g of 866 K, supercooled liquid region Δ T x of 45 K, compressive fracture strength of 2.9 GPa, 1% compressive plasticity, and excellent corrosion resistance as compared to stainless steel. The combination of high thermal stability, high strength with compressive plasticity and excellent corrosion resistance enables these alloys to have potential industrial applications. Furthermore, the addition of Sn to Ni–Nb–Zr–Co alloy is effective for enhancing the stability of supercooled liquid. The maximum supercooled liquid region of 85 K is obtained in Ni 57 Co 5 (Nb 33/38 Zr 5/38 ) 33 Sn 5 BMG.

Twinning induced plasticity (TWIP) steels containing nitrogen as the interstitial alloying element were designed, and the effects of N and Al on stacking fault energy (SFE), microstructure, and mechanical properties were investigated by using X-ray diffraction and transmission electron microscopy to determine the stacking fault formation probability. In addition, the microstructure and mechanical properties have been characterized. The results indicate that both N and Al decrease the stacking fault formation probability due to the increase of the SFE. The probability of localized stacking fault determined by a new method using electron diffraction spot shift reveals that stress- or strain-induced martensitic transformations (γfcc → ehcp → α′bcc) during deformation may consume a large number of stacking faults and give rise to a more marked decrease in the stacking fault formation probability of TWIP steels with lower SFE than of higher one(s). Based on their magnitude of SFEs, the temperature-dependent mechanical properties of four TWIP steels were analyzed.

The high strength of transformation induced plasticity (TRIP) steels with tensile strength from 800 to 1000 MPa were designed based on grain refinement and precipitation strengthening through microalloying with Nb, Nb/V, and Nb/Mo in a Fe-0.2C-1.5Si-1.5Mn cold-rolled TRIP steel. The origins of alloying strengthening for three grades of 860, 950, and 1010 MPa TRIP steels obtained in this work were revealed by the combination of Thermo-Calc and transmission electron microscopy (TEM). The addition of Nb in Nb, Nb/V, and Nb/Mo TRIP steels can effectively refine the austenite grain in the hot-rolled process by the NbC carbides retarding austenite recrystallization and, in turn, refine final microstructure after intercritical annealing. The addition of Nb/V can precipitate partially fine and dispersive (Nb,V)C carbides in ferrite grains instead of coarse NbC carbides; therefore, the precipitation strengthening plays an important role in the increase of TRIP steel strength. The addition of Nb/Mo cannot only precipitate fully fine and dispersive (Nb,Mo)C carbides in ferrite grains but also increase the volume fraction of bainite accompanying the decrease of volume fraction of ferrite, leading to the drastic increase of both the yield strength and tensile strength.

The effect of pre-treatment above glass transition temperature ( T g ) on the reversible structural relaxation in a Zr 62 Al 8 Ni 13 Cu 17 bulk metallic glass at sub- T g annealing has been investigated. It is found that the enthalpy relaxation can be well described by a stretched exponential function. A free-volume model can only qualitatively simulate the process of enthalpy recovery. Sub- T g heat treatments after enthalpy recovery have almost no effect on the following crystallization, which can be accelerated when critical clusters are formed for a longer time annealing.

A method of discrimination between stress-assisted and strain-induced martensitic transformation (MT) using atomic force microscopy is established. The shear angles of the three kinds of face-centered cubic to body-centered tetragonal MT in an Fe–0.1C–1.7Mn–1.2Si transformation-induced plasticity steel are calculated based on our developed method. Comparing the theoretical shear angle with the practical shear angle, the features of three kinds of MT, including stress-assisted, strain-induced and thermal-induced MTs, are revealed.

The isothermal crystallization kinetics of Zr/Ti-based bulk metallic glasses (BMGs) have been investigated by using Avrami exponent. It is a constant nucleation rate and a constant number of quenched-in nuclei that cause the linear John–Mehl–Avrami (JMA) modes in Avrami exponents of Zr 62 Al 8 Ni 13 Cu 17 and Zr 65 Al 8 Ni 10 Cu 17 BMGs, respectively. However, sub-T g pre-annealing of Zr 62 Al 8 Ni 13 Cu 17 , and multiple-step phase transition in Ti 43 Cu 43 Zr 7 Ni 7 and Ti 45 Zr 5 Cu 40 Ni 7.5 Sn 2.5 make their Avrami exponents deviate from the linear JMA mode. The difference in Avrami exponents maybe provides useful information for performing the microstructure control of BMG composites upon isothermal annealing.

A turret of electro-hydraulic servo system and its implementation mechanism is a set of high speed and high precision dierential servo system to control and drive the launcher, which can recurrent the command radar position and movement rules in two directions of azimuth and height. The core part is a set of valve controlled hydraulic cylinder in height and a set of valve controlled motor in azimuth. The mechanical part is composed of servo valve, servo motor, oil cylinder andthe hydraulic energy system and the electrical control signal coming from the dynamic dierential electrical signal given by the command radar. The principle of valve controlled hydraulic is shown in Figure 1.

Considering the difficulty of separating elastic vector wave-fields into different wave modes in anisotropic qP-wave modeling and imaging, acoustic approximation is an effective way. However in heterogeneous TTI media, setting shear velocity along the symmetry axis to zero can cause numerical solutions to be unstable, we solve this problem by introducing three different auxiliary functions including anisotropic parameter σ, and deduce three TTI second-order qP-wave equations and the corresponding first-order stress-velocity forms. Then, we solve the TTI first-order qP-wave equations by the improved RSFD method to avoid elastic modulus interpolation and enhance numerical accuracy. Numerical results show the validity and stability of the proposed method.

The anisotropy exists widely underground, ignoring anisotropy in migration may lead to large positional errors. In the aspects of computational cost and efficiency, acoustic approximated anisotropic first-order stress-velocity qP-wave equations are better the elastic one. Considering the advantages of avoiding elastic modulus interpolation in rotated staggered-grid finite-difference (RSFD) scheme, so it’s more suitable for anisotropic qP-wave modeling and reverse time migration. However, RSFD scheme tends to cause numerical dispersion due to the need of larger steps. Using the optimal RSFD operator based on dispersion relation and least squares scheme can suppress spatial dispersion efficiently and enhance modeling accuracy, and further improve the imaing quality. Therefore, we construct the anisotropic wave-field extrapolator by LS-RSFD method, and implement accurate VTI and TTI pseudo-acoustic wave numerical modeling and reverse time migration.

The tensile behavior of a Ni60Nb40 metallic glass (MG) has been studied by using ab initio density functional theory (DFT) calculation with a large cell containing 1024 atoms (614 Ni and 410 Nb). We provide insight into how a super elastic limit can be achieved in a MG. Spatially inhomogeneous responses of single atoms and also major polyhedra are found to change greatly with increasing external stress when the strain is over 2%, causing the intrinsically viscoelastic behavior. We uncover the origin of the observed super elastic strain limit under tension (including linear and viscoelastic strains) in small-sized MG samples, mainly caused by inhomogeneous distribution of excess volumes in the form of newly formed subatomic cavities.

In this paper, we present the implementation of infeasible kernel-based primal-dual interior-point methods for linearly constrained convex optimization. Numerical results are provided to demonstrate the efficiency of the algorithms.

The dependence of shear yield strain, the activation energy and volume of shear transformation zone on the glass transition temperature was investigated through the analysis of statistical distributions of the first pop-in events during spherical indentation of four different thin film metallic glasses. Only the Cu-Zr metallic glass exhibits a bimodal distribution of the first pop-in loads, whereas W-Ru-B, Zr-Cu-Ni-Al and La-Co-Al metallic glasses show an unimodal distribution. Results show that shear yield strain and activation energy of shear transformation zone decrease whereas the volume of shear transformation zone increases with increasing homologous temperature, indicating that it is the activation energy rather than the volume of shear transformation zone that controls shear yield strain. (C) 2015 Elsevier B.V. All rights reserved.

EPON ring network was applied in networking and cabling of mine to improve mine mechanical and electrical equipment of intelligent system network operation instability as well as high fault rate. When there is a single node failure, there is potentially a paralysis of the entire network system. EPON ring network can improve the safety and reliability of the whole network system. Keywords-EPON; ring network; mechanical and electrical equipment

There are many problems such as various unknown signals, poor signals' stability and high error rates in the process of transmission. In view of the complex sensor distribution as well as various types of signals. This paper put forward a kind of device which can realize linear transformation from frequency signals to the frequency of the current linear transformation isolation. The device's circuit structure has a strong anti-interference ability, which can be applied to all kinds of sensor signal transmission system and has a great value.

Transformation induced plasticity (TRIP) steels exhibit a combination of high strength and ductility due to their multi-phase microstructure, including ferrite, bainite and retained austenite which transforms to martensite under the external stress. The characterization of microstructures is necessary for understanding the relationship between microstructure and property. In the present work, an effort to determine the volume fraction of various phases was made for the conventional TRIP steel containing silicon. The microstructures in the TRIP steel were characterized by optical microscopy, scanning electron microscopy and transmission electron microscopy, especially, an effective method was developed to identify multi-phase microstructures by atomic force microscopy based on the height difference. Furthermore, the stability of retained austenite determining TRIP effect was evaluated by electrical resistance tests and tensile tests. The results show that retained austenite does not generate martensitic transformation at −80 °C and exhibits a good thermodynamic stability, and the transition temperature from stress-induced martensitic transformation to strain-induced martensitic transformation is determined as about −5 °C, and thus strain-induced martensitic transformation over −5 °C (somewhat lower than room temperature) is favorable for the application of TRIP steels in the automobile industry.

The microstructure features of an austenitic Fe–23Mn–2Si–2Al (mass%) alloy with addition of niobium (0.017 mass%) were investigated as a function of deformation temperature (20 to −75 °C). The observation of optical microscopy and transmission electron microscopy (TEM) indicated that a large number of twins induced by deformation above −60 °C result in relatively high total elongations of about 80% and the increase of the ultimate tensile strength from 660 to 750 MPa, which is called twinning-induced plasticity (TWIP). At temperatures below −60 °C, the stability of the austenite decreases and multiple martensitic transformations among γ fcc (austenite), ɛ hcp (hcp-martensite) and α bcc (bcc-martensite) occur after TWIP effect, which were determined by both TEM and X-ray diffraction. With transformation-induced plasticity, total elongations reached 87% and ultimate tensile strength reached 810 MPa. The effect of Nb on TWIP/TRIP in the steel is discussed.

This study analyzed the characteristics of the apparent molecular weight distribution (AMWD) of the secondary effluent organic matter and investigated the effect of various applicable pretreatment technologies for ultrafiltration (UF), including coagulation, powdered activity carbon (PAC) adsorption and O3-PAC process, on the AMWD of effluent and the flux decline. The influence of molecular size distribution on the mean pore size and pore density of membrane was then evaluated with the model of membrane structure parameter. The results showed: (1) after different pretreatments, the AMWD of raw water changed, coagulation could effectively remove high molecular weight organics, PAC adsorption was effective in removing low molecular weight organics, due to ozonization and PAC adsorption and O3-PAC pretreatment could remove both high molecular weight and low molecular weight organics; (2) the AMWD had great influence on membrane permeation, after different pretreatments, the AMWD of raw water changed and the variation of membrane permeation was also different; (3) the influence factors a1and a2 of the mean pore size and the membrane pore density of different pretreatment water samples were used as indexes which calculated through experiment and the model of membrane structure parameter. The influence of AMWD in water samples on the membrane mean pore size and pore density were then evaluated, which showed that low molecular weight organics could easily cause interior adsorption, and high molecular weight organics could easily cause membrane surface blocking.

We have systematically studied the growth of highly strained InGaAs quantum wells (QWs) at low growth temperatures by molecular beam epitaxy (MBE). Photoluminescence (PL) measurements show that the emission wavelength increases gradually when increasing the In content from 24% up to 42% while the PL intensity dramatically drops when the In content is above 39%. Luminescence at 1.245 μm is achieved from a 7 nm thick In 0.42 Ga 0.58 As QW with a linewidth of only 17.7 meV. Lasing at 1.182 and 1.215 μm occurs from an In 0.36 Ga 0.64 As QW and an In 0.39 Ga 0.61 As QW laser, respectively. In the first case, a high characteristic temperature, T 0 of 213 K between 20 and 60 °C and that of 136 K between 60 and 70 °C are obtained.

We report molecular beam epitaxy (MBE) growth and device performance of 1.3 μm GaInNAs/GaNAs single-quantum well lasers on GaAs substrates. Record low threshold current densities of 300, 320 and 360 A/cm 2 for cavity lengths of 1200, 1000 and 800 μm, respectively, and a transparency current density of only 84 A/cm 2 are achieved for the 100 μm wide broad area lasers. A characteristic temperature of 108 K is measured in the temperature range of 8–70 °C for a laser with a cavity length of 1000 μm. We find that optimization of the RF nitrogen source during the MBE growth plays a crucial role in reducing the threshold current density.

The composition and temperature dependence of static and dynamic structures in NixNb1-x (x = 50-70 at. %) were systematically studied using molecular dynamics with a new-released semi-empirical embedded atom method potential by Mendelev. The calculated pair correlation functions and the structure factor match well with the experimental data, demonstrating the reliability of the potential within relatively wide composition and temperature ranges. The local atomic structures were then characterized by bond angle distributions and Voronoi tessellation methods, demonstrating that the icosahedral ⟨0,0,12,0⟩ is only a small fraction in the liquid state but increases significantly during cooling and becomes dominant at 300 K. The most abundant clusters are identified as ⟨0,0,12,0⟩ and distorted icosahedron ⟨0,2,8,2⟩. The large fraction of these two clusters hints that the relatively good glass forming ability is near the eutectic point. Unlike Cu-Zr alloys, both the self-diffusion coefficient and shear viscosity are insensitive to compositions upon cooling in Ni-Nb alloys. The breakdown of the Stokes-Einstein relation happens at around 1.6Tg (Tg: glass transition temperature). In the amorphous state, the solid and liquid-like atoms can be distinguished based on the Debye-Waller factor ⟨u2⟩. The insensitivity of the dynamic properties of Ni-Nb alloys to compositions may result from the relatively simple solidification process in the phase diagram, in which only one eutectic point exists in the studied composition range.