Wire Surface Research Articles

Electrochemical Oscillation during Dissolution of Iron in High Concentration of Nitric Acid

Electrochemical oscillations are attractive phenomena from the viewpoint of dynamic self-organization of molecular systems. In general, an N-shaped negative differential resistance (N-NDR) plays a crucial role in the appearance of oscillations because it gives rise to oscillatory instability [1]. Most of the oscillations can be classified into an N-NDR type or “hidden” N-NDR (HN-NDR) type oscillator. The former shows current oscillations under potential controlled conditions and hysteresis loops under current-controlled conditions, whereas the latter shows not only current oscillations but also potential oscillations.Iron dissolves in aqueous HNO3 solutions, accompanied by hydrogen evolution reaction. This dissolution reaction is written as follows:Fe → Fe2+ + 2e- (1)2H+ + 2e- → H2. (2)On the other hand, the dissolution does not take place in concentrated HNO3 solutions (i.e., 13 M HNO3) because of the formation of a passivation film on the surface. However, when the concentration of HNO3 is approximately 10 M, the dissolution and passivation of iron occur alternatively. In other words, only when an iron wire is immersed in a high concentration of HNO3, the rest potential of the iron wire oscillates spontaneously. This phenomenon is of interest because its appearance does not require any external devices.In this work, to clarify the mechanism of the spontaneous oscillation, we observe the surface of an iron wire during the oscillation using a high-speed camera (Figure 1) and measure electrochemical impedance spectra. From these studies, we can say that the oscillation is an HN-NDR type, which will be discussed in the presentation. Reference M. Orlik, Self-Organization in Electrochemical Systems I, Springer-Verlag Berlin Heidelberg, Berlin (2012). FIGURE CAPTION Figure 1 Time course of rest potential of an iron electrode in 10 M nitric acid and snapshots of the electrode. Figure 1

Preparation of copper nanowires and thermal oxidation behaviour in dry oxygen

Copper (Cu) nanowires are a promising functional and structural material in electronics, optoelectronic devices and integrated circuits. The preparation and thermal stability of Cu nanowires are crucial for the functional realisation and performance stability of related devices. In this work, the authors particularly prepared Cu nanowires by a two-step approach and further studied the thermal oxidation behaviour of Cu nanowires in dry oxygen. It was found that the as-prepared Cu nanowires have a good (111)-oriented single crystal structure with a smooth and clean surface. With the increase of annealing temperature and time, the Cu nanowires were oxidised gradually in dry oxygen and the crystal phase of Cu nanowires underwent the evolution of Cu (111)→Cu2O (111)→CuO (−111)+(111). Furthermore, when the temperature was not higher than 400°C, the as-formed Cu2O and CuO layers or nanowires were slightly crystallised or nearly amorphous. However, when the temperature was higher than 400°C, the as-formed CuO nanowires were greatly crystallised. It was further observed that the oxidation of Cu nanowires arose from the wire surface and formed a non-dense, nearly amorphous layer of Cu2O nanoparticles therein. Such Cu2O layer on the surface of Cu nanowires greatly reduces optical transmittance.

Corrosion characteristics and damage constitutive model of galvanized steel wires for bridge cables

The characteristic parameters of corrosion pits on the surface of steel wires in service bridges are discussed. The degradation of mechanical properties of corroded steel wires and its relationship with different corrosion evaluation parameters are studied through tensile test. Finally, the damage constitutive model of corroded steel wires is established by introducing the damage variable D. The results show that there are four types of corrosion pits on the surface of steel wires, including the deep ellipsoid, shallow ellipsoid, groove and saddle shape. The higher the corrosion degree of steel wires, the less the number of deep ellipsoidal pits, the more the number of groove and saddle pits. The average corrosion depth of steel wires is positively correlated with the maximum pit depth, width and length. The strength of corroded steel wires mainly depends on the maximum pit depth. In addition, compared with the new steel wire, the average yield strength and ultimate strength of old steel wires decrease due to the influence of corrosion and the discreteness increases. The similarity of probability density function of new and old steel wires is high, and the corrosion has little effect on the elastic modulus of steel wires. Finally, the model curve is in good agreement with the experimental curve, and the proposed damage model of corroded steel wires is basically accurate.

Temporal and spatial variability of corrosion of high-strength steel wires within a bridge stay cable

The temporal and spatial corrosion variability of high-strength steel wires has a significant influence on the service performance deterioration behaviors of bridge stay cable. To proposed quantitative descriptions of the temporal and spatial variability, three different kinds of specimens are manufactured by Galvanized steel wires, and the accelerated corrosion experiments are conducted. For the single-wire specimens, the uniform corrosion process, the variation of surface microtopography and the time-dependent pitting corrosion model are investigated. In addition, the spatial corrosion variability of wires within a cable cross section is investigated by considering different damage conditions of sheath. It is found that the uniform corrosion process of the single-wire specimen can be divided into two stages, which correspond to the corrosion of Galvanized coating and substrate, respectively. The variability of uniform corrosion depth decreases firstly and then tends to be steady. The microtopography of corroded wire surface tends from compact spherical structure to be porous, hollow and loose. In the second corrosion stage, the corrosion products seem to be small clumps fluffy or flowery floccule, and then tend to be lamellar cross form and sand granular. The block maximum pitting factor of a single wire can be described by Gumbel distribution, and in the developed time-dependent model, both the location parameter and scale parameter decrease exponentially in the first corrosion stage and linearly in the second corrosion stage. The corrosion process difference factor of wires in adjacent layers of stay cable can be described by Normal distribution when the sheath is globally aging, and the mean value and coefficient of variation are 0.6758 and 0.2543, respectively. The spatial corrosion variability of cable wires is significantly affected by the broken shape of sheath. The difference of global corrosion degree of wires in different layers decreases with the extension of the exposure period. The sheath with rectangular broken shape and quadrate broken shape will lead to stronger spatial corrosion variability in cable wires than that with semi-annular broken shape.

Convergence of the MPIE Galerkin MoM Thin Wire Formulation

Convergence studies of the Method of Moments solution of thin wires have long been handicapped by the issue of conditional convergence: when the segment length approaches the wire radius, the approximations typically made result in exponentially diverging solutions. In this communication, it is shown that it is the approximation of the singularity which is the main cause of this problem. Using the mixed potential integral equation, paralleling the classic RWG formulation for surfaces, the formulation in this communication approximates the surface (as opposed to equivalent filamentary) current, and applies Galerkin testing on the wire surface. The use of contemporary singularity-canceling integral transforms for highly efficient and accurate quadrature is demonstrated. Results are presented for typical thin-wire dipoles for both radiation and scattering problems. It is shown that with a rigorous treatment of the singularity, a far more comprehensive convergence study may be undertaken than previously demonstrated. Furthermore, the results shown justify the many years of successful use in practice of simple source models with modest mesh requirements.

Alüminyum Kaplanmış Çelik Tel Muayenesinde Kullanılan Girdap Akımları Muayene Sistemi için Çevreleyici Prob Tasarımı

In this paper, an encircling probe design used in the inspection of conductive wires, which are qualified as aluminum clad steel (ACS) wire is made. The eddy current systems are widely used for the quality control of conductive materials as one of non-destructive testing methods. In these systems, it is possible to design and to use different types of probes according to the material type. Internal, encircling and surface probe types are used for the inspection of pipes, wires and plate conductive materials, respectively. The discontinuities on the conductor surfaces are detected and the changes in the inductance values of the coils of probes are analyzed with the electronic hardware and the quality control of the material is ensured. In this study, a sensitive probe design is realized to detect various defect on wire surfaces. The inductance value of the designed probe is calculated by using two and three dimensional finite element analysis (FEA) and the obtained results are compared. The inductance change of the probe was measured by an LCR meter while the probe contained sample ACS wires with different types of defects, these values are given in the table and the change graph is plotted. In addition, an impedance bridge circuit was set up with the probe and the results of the change in voltage induction on the coil are given as an oscilloscope image.

Enhancing the Up-conversion luminescence using All dielectric Three-Dimensional multiscale anodized aluminum oxide nanowire structure

Light management at nanometric dimension for boosting the enhancement of photo luminescence from Lanthanide doped up-conversion nanoparticles (UCNPs) has evidenced epochal advancement attributed to their conspicuous emission properties and plethora of potential applications. In this work, a multiscale funnel shape three dimensional (3D) anodized aluminum oxide (AAO) nanowire topography is explored to improve up-conversion luminescence (UCL) of synthesized core shell (C/S) NaYF4:Yb3+,Tm3+/NaYF4 UCNPs dispersed in chloroform. The different hexagonally arranged AAO topographies, based on cost-effective and modified self-aggregation fabrication method, are presented. These unique topographies of nanowire structures provide archetypal for enhanced UCL and have been investigated to study the effect of light management in detail. The systematic studies indicate that UCL enhancement is substantiated by the prolonged light path due to multiple scattering, and guided modes in the length of nanowire structures with the modified surface topography hoisted by capillary force inside the nanowires. The length of the nanowire and structure’s topographies are endorsed as structural parameters to tune the reflection as well as resonance mode for tuning the enhancement. The overall UCL enhancement for an optimized wire length and surface topography of AAO substrate is found to be ∼ 115 fold in ultra-violate regime at low excitation power density.

Investigation of breaks of the «Sparking» type of brass‑plated wire for metal cord and high‑pressure hoses and the causes of their formation

The article examines the breaks of thin brass‑plated wire for metal cord and high‑pressure hoses of the “sparking” type and the causes of their formation. The wire was manufactured in OJSC “BSW” – he Management Company of the Holding” BMC “ in the conditions of steel‑wire workshops. The appearance and microstructure of breaks of thin brassplated wire of the “sparking” type are investigated. As a result of the analysis of the appearance and microstructure of the breaks, it was assumed that surface defects are formed on the brass‑plated wire – billet during the welding connection in the jaws of the welding machine during annealing. To confi m this, experiments were carried out with the implementation of welded joints of brass – plated wire‑blanks in wet drawing areas, the appearance and microstructure of the obtained samples of welded joints were studied.As a result of experiments and metallographic studies, the assumption was confirmed that local defects such as “cauterization from sparking” on the surface of the workpiece wire are formed during welding during the annealing operation, it was established that the cause is a violation of contact between the wire and the pressure jaws of the welding machine, wear of the pressure jaws. Photos of the defect, a description of its appearance and microstructure are given.Based on the obtained studies, a number of measures were carried out aimed at eliminating the causes of this defect.

Influence of Roll Diameter on Material Deformation and Properties during Wire Flat Rolling

The influence of roll diameter on the strain distribution, shape change, contact pressure, and damage value of a workpiece was investigated during wire flat rolling to control the material properties of the flattened wire. The flattened wires fabricated by the four different rolls were compared using finite element analysis. The strain inhomogeneity of the flat-rolled wire increased with the roll diameter; thus, the macroscopic shear bands were strengthened as the roll diameter increased during wire flat rolling. The contact width and lateral spreading of the flattened wire increased with the roll diameter; therefore, the reduction in area decreased with the roll diameter. The contour of the normal contact pressure on the wire surface exhibited a similar pattern regardless of the roll diameter. The contact pressure showed higher values at the entry, edge, and exit zones in the contact area. The distribution of the damage value varied with the roll diameter. The free surface region tended to have the peak damage value during the process; however, the center region exhibited the maximum damage value with the roll diameter. From the perspective of the damage value, the optimum roll diameter was in existence during wire flat rolling. The underlying cause of the different strain distributions, shape changes, and damage values of the flat-rolled wire was the different contact lengths originating from the different roll diameters during wire flat rolling.

Fatigue life evaluation of high-strength steel wires with multiple corrosion pits based on the TCD

The stay cable composed of high-strength steel wires is susceptible to external corrosion during service, and multiple pitting damage will occur on the surface of steel wires. For the sake of simplifying the pitting morphology, this paper used artificial notches to simulate corrosion pits, and the fatigue properties of high-strength steel wires with multiple notches were systematically studied. First, fatigue tests of steel wires with multiple pits were performed, and the finite element models were established by ABAQUS software. The fitting equations related to stress concentration factor (SCF) and corrosion pit parameters were obtained. Subsequently, the fatigue life of corroded high-strength steel wires was predicted by the Point method (PM) and the Line method (LM) originated from the Theory of Critical Distances (TCD). Finally, the prediction results compared with the experimental results. The results show that the fatigue life of steel wires with a single pit is mainly related to the pit depth-to-length ratio. The fatigue life of steel wires with double pits located on the same side mainly depends on deeper pits, but it slightly decreases as the increase of the depth of shallow pits. The effect of the spacing of double pits is very small. The fatigue life of steel wires with double pits in the circumferential direction decreases as the angle between the double pits increases. The reliability of the TCD for fatigue evaluation of multi-notch components is verified.

Frictional Forces of Three Types of Lingual Appliance with Self-ligating Mechanisms

The present study compared the frictional forces of three types of self-ligating lingual appliances. The lingual appliances (2D, Forestadent; Alias, Ormco; and Clippy L, Tomy International) consisted of a self-ligating bracket (second premolar) and two self-ligating tubes (first and second molars) bonded to a stainless steel jig and attached to a "drawing-friction tester." Full-size and non-full-size stainless steel archwires were tested, and the static and kinetic friction acting on six lingual appliance/wire combinations was estimated (n = 5). Three-dimensional micro-computed tomography (micro-CT) analysis of each premolar bracket was performed. The frictional forces were compared between the bracket/wire combinations using the Kruskal-Wallis and Mann-Whitney U tests. The Alias and Clippy L bracket/wire combinations had greater contact between the wire surfaces and bracket slots compared to the 2D bracket/wire combination. For all lingual appliances, the static and kinetic frictional forces were significantly higher for the full-size than non-full-size archwire. The 2D bracket, which had a wider outer wing, had less frictional force than the other appliances. The Alias, which had a narrower outer wing, had a significantly lower frictional force than the Clippy L. Frictional force was significantly higher for heavier full-size bracket/archwire combinations than for non-full-size archwires. The 2D bracket had lower frictional force due to its archwire-holding mechanism. The outer wing width may influence the frictional resistance. The frictional forces of self-ligating lingual appliances vary, and bracket design and archwire size may influence the frictional performance.

Machining the Surface of Orthopedic Stent Wire Using a Non-Toxic Abrasive Compound in a Magnetic Abrasive Finishing Process

The orthopedic stent wire is one of the critical medical components, which is mainly used for the replacement of physically damaged parts in the human body. Therefore, a smooth surface and lack of toxic substances on the surface of this component are highly demanded. In this study, a magnetic abrasive finishing (MAF) process was carried out using a non-toxic abrasive compound (a mixture of iron powder, diamond particles, cold cream, and eco-friendly oils) to achieve high-quality surface finishing of orthopedic stent wire. The surface roughness (Ra) of the stent wire was investigated according to various processing parameters: different rotational speeds (500, 1000, and 2000 rpm), diamond particle sizes (1.0 µm), and three eco-friendly oils (olive oil: C98H184O10; grapeseed oil: C18H32O2; and castor oil: C57H104O9) within 300 s of the finishing time. The results showed that the surface roughness of the wire was reduced to 0.04 µm with a rotation speed of 1000 rpm and a diamond particle size of 1 µm when using grapeseed oil. SEM microimages and EDS analysis showed that the MAF process using a non-toxic abrasive compound could improve the surface quality of orthopedic Ni-Ti stent wire with a lack of toxic substances on the surface finish.

Influence of corrosion pit on the tensile mechanical properties of a multi-layered wire rope strand

The influence of corrosion pit on the tensile mechanical properties of a multi-layered wire rope strand is analyzed in the present study. To this end, the spatial parametric equations for wire axes of the strand with a corroded outer-layer wire are deduced. Based on these equations, the geometric model and high-precision mesh model of the strand are established with the considerations of the factors, including the effect of the corrosion pit on the wire surface morphology, the distribution form of the pits, and the elasto-plasticity of the wires. Finite element simulations of the tensile mechanical properties of the strand are carried out, and the influences of the corrosion pit on the stress–strain property, contact behavior and loading capacity of the strand are analyzed. The results show that obvious stress concentration occurs in the corrosion area of the corroded strand, and the existence of the corrosion pit significantly increases the stress, strain and the inter-wire contact pressure, while reduces the axial loading capacity of the strand. The stress concentration factor, maximum stress, maximum plastic deformation, maximum contact pressure and loading capacity of the strand all increase first and then decrease with the direction angle of the corrosion pit, while decrease with the position angle of the corrosion pit. For the multi-layered wire rope strand with a corroded outer-layer wire, the deterioration of the tensile mechanical properties of the strand is the most serious when the corrosion pit is located at the outer contour area of the strand and the major axis of the pit is perpendicular to the axis of the outer-layer wire.

Improvement of the adhesion in functional NiTi wire/polymer composites made by additive manufacturing

Additive manufacturing allows the integration of shape memory wires into polymer matrices. Actuators produced in this way offer a wide range of shapes and wire integration appropriate to external loads is feasible. To reach this aim, NiTi wires and a polymer matrix may be co-deposited simultaneously using an Arburg plastic freeformer. The actuator abilities and reliability are largely affected by the load transmission between the NiTi wire and the polymer matrix. Therefore, different surface treatments are investigated to improve the adhesion. The influence of various treatments is quantified by performing pull-out tests and evaluating the surface roughness. The biggest impact on the interfacial shear strength (ISS) was achieved by a laser gas nitration of the wire surface before embedding them in the matrix material. This approach increased the ISS by a factor of 11 compared to the initial state.

Measurements of void fraction, liquid temperature and velocity under boiling two-phase flows using thermal-anemometry

Forced convective boiling is of great interest for several applications in the power and process industry, particularly in nuclear plants. Under certain nominal, incidental or accidental conditions, boiling crisis (considering Departure from Nucleate Boiling as well as Dry-Out) may lead to mechanical damage of the heated surface. An accurate prediction of the conditions leading to the occurrence of this phenomenon is then essential. It is believed that such an objective cannot be reached unless a good and accurate description of the associated two-phase flow is provided. In our work, we propose to use thermal anemometry for measuring the void fraction, the liquid temperature and liquid velocity for high pressure and high temperature Freon R134A boiling flow. Experiments have been conducted in a circular tube whose inner diameter and length are 19.2 mm and 3.5 m, respectively. The tube is heated by Joule effect. The sensor (hot-wire d5μm) has been operated with the Constant Current mode (CCA) and the multiple overheating method, which is classical for gas measurements but seems to be very innovative for liquid flows. This method, has been used to access simultaneously the liquid velocity and temperature. To consider for temperature effect on velocity calibration, a new non-dimensional representation of the calibration curve has been proposed. The frequency response of the probe has also been improved using a digital compensation method. The method has been first checked for single-phase flows and has shown that it was possible to get very accurate measurements of both mean and fluctuating liquid and temperature profiles. For boiling flows, a specific two-steps approach has been developed to first measure the void fraction where it is necessary to set a high overheat ratio leading to boiling on the wire surface and secondly to measure the liquid temperature and velocity for the case where boiling on the wire surface is not acceptable due to the multiple overheating method. An innovative method using probability density functions has been adapted from the pioneering work of Delhaye (1969).Some tests have been conducted for boiling flows and the experimental results have been compared to previous ones using thermocouples and optical probes for respectively the liquid temperature and the void fraction. The experimental uncertainties have been carefully analyzed and they are estimated to be close to 0.5 °C for the liquid temperature, ±2% for the void fraction (absolute uncertainty) and ± 5% for the liquid velocity (relative velocity). Those data aim to be used for NEPTUNE_CFD code validation.

Monolith/aminated graphene oxide composite-based electric field-assisted solid phase microextraction for efficient capture of phenoxycarboxylic acids herbicides in environmental waters

Efficient capture of strongly polar, ionizable and trace phenoxycarboxylic acids herbicides (PCAHs) from aqueous samples is essential and challenging for environmental monitoring. In the present work, electric field-assisted solid-phase microextraction (EFA-SPME) based on monolith/aminated graphene oxide composite was developed for the first time to efficiently extract trace PCAHs prior to HPLC-tandem mass spectrometry (HPLC-MS/MS) quantification. First, poly (1-allyl–3-methylimidazole difluoromethanesulfonylamide salt-co-divinylbenzene/ethylene dimethacrylate) monolith/aminated graphene oxide composite (MAC) was prepared on the surface of stainless steel wire and employed as the extraction phase of SPME. After that, the MAC-based fiber and a stainless steel wire were connected to a DC power supply that allowed the implement of variable electric fields during adsorption and desorption processes. Various key factors influencing the extraction performance were inspected in detailed. Results well evidenced that the exertion of electric fields improved the enrichment performance, accelerated the trap and release procedures. The proposed MAC/EFA-SPME-HPLC-MS/MS method achieved wide linear ranges (0.005–50.0 μg/L), low limits of detection (0.54–1.3 ng/L) and good precision (2.7–7.0%) for the quantification of PCAHs. The related extraction mechanism was deduced. Additional, the current approach was successfully applied to monitor studied PCAHs at trace contents in environment waters, and the accuracy was confirmed by confirmatory experiments.

Wettability Difference Induced Out-of-Plane Unidirectional Droplet Transport for Efficient Fog Harvesting.

Securing freshwater resources is a global issue for ensuring sustainable development. Fog harvesting is attracting great attention as a method to collect water without any energy input. Previous reports that were inspired by insects and plants have given insights such as the effectiveness of in-plane wettability and structural differences for droplet transport, which might enhance artificial water harvesting efficiency. However, further efforts to transfer droplets while maintaining performance are needed because droplet motion owing to these effects is limited to the in-plane direction. In this study, we report droplet transport between three-dimensional copper wire structures with nanostructured hydrophobic and superhydrophilic features. This mechanism enhanced the fog harvesting capability by more than 20% compared with the cumulative value of individual wires. In addition, the relationship between the droplet height and spacing of wires affected the performance. Our results show the importance of out-of-plane directional droplet transport from the wire surface assisted by differences in wire wettability, which minimizes limiting factors of fog harvesting including clogging and droplet shedding. Furthermore, the proposed arrangement reduces the overall system width compared with that of a two-dimensional arrangement while maintaining the amount of harvested water. These results provide a promising approach to designing large-scale and highly efficient fog harvesters.

Surface Evaluation of Orthodontic Wires Using Texture and Fractal Dimension Analysis.

Mechanical properties of orthodontic wires can have a very significant impact both on the resistance of the entire appliance to the oral cavity conditions and directly on the effectiveness of the therapy. Striving to achieve repeatability of mechanical characteristics of orthodontic wires of a given type should be an obligatory condition in their production. To achieve it, these components should be thoroughly analyzed using various mechanical tests. Twenty-four steel and nickel-titanium orthodontic wires from four different manufacturers were examined. Each wire was subjected to fractal dimension analysis and texture analysis. The two sides of each wire were compared against each other, as well as in terms of variation in the surface area for each wire type made by different manufacturers. Most wires showed significant variation in fractal dimension and texture, both when comparing two sides of the same wire and between individual wires of a given type made by a single manufacturer. When conducting research and clinically using orthodontic wires made of Ni-Ti alloys and stainless steel, it should be assumed that the surface of orthodontic wires shows a significant degree of variation, and wires of the same type from the same manufacturer may differ significantly in this respect.

Development of electrodeposited nanostructural poly (o-aminophenol) coating as a solid phase microextraction fiber for determination of bisphenol A

In this research nanostructural poly (o-aminophenol) was synthesized by electropolymerization and used for solid phase microextraction procedure (SPME). Thin film of Poly (o-aminophenol) (4 µm thickness) was shaped by sweep potential for 45 min on the surface of stainless steel wire. Polymer was synthesized by potentiostat procedure too. Prepared polymer by sweep potential procedure showed nanostructures on the surface. Acetic anhydride was employed for derivatization of bisphenol A (BPh-A) and analysis of acetylated BPh-A was utilized by gas chromatography-flame ionization detector (GC-FID). Affecting parameters on derivatization and extraction such as amount of acetic anhydride, stirring rate, temperature, ionic strength and extraction time were optimized. The limit of detection (LOD) and relative standard divisions (RSDs%) were achieved 0.6 µgL-1 and less than 6.8%, respectively under optimized conditions. Finally proposed method was used for extraction of bisphenol A from leaching of baby and drinking water bottles. Relative recovery was achieved 98% for leaching from drinking bottle. In leaching from plastic baby bottle, bisphenol A (BPh-A) was detected in the range 5–15 µg L-1.

Enhancement of Magnetic and Tensile Mechanical Performances in Fe-Based Metallic Microwires Induced by Trace Ni-Doping.

Herein, the effect of Ni-doping amount on microstructure, magnetic and mechanical properties of Fe-based metallic microwires was systematically investigated further to reveal the influence mechanism of Ni-doping on the microstructure and properties of metallic microwires. Experimental results indicate that the rotated-dipping Fe-based microwires structure is an amorphous and nanocrystalline biphasic structure; the wire surface is smooth, uniform and continuous, without obvious macro- and micro-defects that have favorable thermal stability; and moreover, the degree of wire structure order increases with an increase in Ni-doping amount. Meanwhile, FeSiBNi2 microwires possess the better softly magnetic properties than the other wires with different Ni-doping, and their main magnetic performance indexes of Ms, Mr, Hc and μm are 174.06 emu/g, 10.82 emu/g, 33.08 Oe and 0.43, respectively. Appropriate Ni-doping amount can effectively improve the tensile strength of Fe-based microwires, and the tensile strength of FeSiBNi3 microwires is the largest of all, reaching 2518 MPa. Weibull statistical analysis also indicates that the fracture reliability of FeSiBNi2 microwires is much better and its fracture threshold value σu is 1488 MPa. However, Fe-based microwires on macroscopic exhibit the brittle fracture feature, and the angle of sideview fracture θ decreases as Ni-doping amount increases, which also reveals the certain plasticity due to a certain amount of nanocrystalline in the microwires structure, also including a huge amount of shear bands in the sideview fracture and a few molten drops in the cross-section fracture. Therefore, Ni-doped Fe-based metallic microwires can be used as the functional integrated materials in practical engineering application as for their unique magnetic and mechanical performances.