Dingfei Zhang's research while affiliated with Nankai University and other places
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Publications (171)
The microstructure, dynamic recrystallization behavior and texture evolution of an as-extruded Mg–6Zn–1Mn–0.2Gd (ZMG610) alloy at different extrusion conditions (extrusion ratios of 25 and 45, temperatures of 350 and 400°C) were investigated. The as-cast ZMG610 alloy was mainly composed of the α-magnesium (α-Mg) matrix, the Mg 7 Zn 3 phase and Mg 3...
The effects of extrusion temperatures (430, 450, 470 and 490 °C) on the microstructures and mechanical properties of Mg–11Gd–5Y–2Zn–0.7Zr (GW) alloys at room temperature (RT), 250, 300, 350 °C were systematically investigated. The dynamic precipitation of blocky and lamellar long period stacking ordered (LPSO) phases was taken place during hot extr...
The microstructural features of long period stacking ordered (LPSO) phase in Mg–(11-x)Gd–xY–1Zn–0.3Zr (wt.%) alloys were optimized by adjusting Gd/Y ratios to10:1, 8:3, 6:5, 4:7 and 2:9, respectively. Superior high-temperature strength was successfully obtained in the extruded 6Gd–5Y alloy with ultimate tensile strength (UTS) values of 338 MPa and...
The mechanical properties of the extruded and peak-aged Mg-12.8Gd-4.7Y-2.6Zn-0.9Zr (wt.%) (GWZ1352) alloys at room and high temperatures were systematically investigated with respect to their microstructures. The microstructural features were tailored through altering the cooling rates after homogenization by water-quenching, air-cooling and furnac...
In this work, novel turned-bearing extrusions (TBE) conducted by using the dies with the single corner and double corner, named SC-TBE and DC-TBE respectively, are developed to introduce additional shear strain during the preparation of AZ31 alloy sheets, which is expected to improve the strengths of sheets. Numerical simulations are conducted to u...
The low specific capacity and Mg non-affinity of graphite limit the energy density of ion rechargeable batteries. Here, we first identify that the monolayer C12-3-3 in sp2-sp3 carbon hybridization with high Li/Mg affinity is an appropriate anode material for Li-ion batteries and Mg-ion batteries via the first-principles simulations. The monolayer C...
In this work, we reported an unusual phenomenon of strain neutral layer (SNL) spreading in an as-rolled AZ31B magnesium alloy sheet during V-bending. The SNL on the middle symmetrical surface perpendicular to the transverse direction (TD) of the sheet extended to the compression region and was accompanied by a mound-like feature. However, the SNL o...
In this study, a novel alloy designing concept, refining grain size and depressing intergranular deformation (inter-GD) simultaneously, is put forward to prepare the Mg alloy with preeminent strength-ductility synergy. A basic alloy, Mg–1Sb–1Mn (SM11), is extruded at 220 °C to attain ultrafine microstructure. Thereafter, the co-addition of Sn and Z...
LZ91 Mg-Li alloy plates with three types of initial texture were rolled by 70% reduction at both room temperature and 200 °C to explore the rolling texture formation of α-Mg phase. The results showed that the rolling texture is largely affected by the initial texture. All the samples exhibited two main texture components as RD-split double peaks te...
Despite the laminated composite sheets of dissimilar magnesium (Mg) alloys have attracted great attention due to their excellent comprehensive mechanical properties as compared to the sheets of individual alloys, how the structural parameters, especially the layer thickness ratio (LTR), influence their formability is still left unstated in the prev...
In this work, laminated composite sheets of Mg alloys AZ31 and Mg-xGd are fabricated through co-extrusion using a pothole die. The asymmetric deformation of the dissimilar Mg alloys during the extrusion is analyzed by combining the results of experiments and numerical simulations. The microstructure, tensile properties and bendability of the lamina...
The demand for soluble magnesium alloys with high plasticity used for sealing tools in petroleum field is increasing. Here, the effects of Ni content (0.1, 0.2 and 0.5wt.%) on microstructure, mechanical properties and corrosion rate of Mg-2Gd alloy were studied. The volume fraction of LPSO phases and the average grain size (α-Mg) increased and decr...
A significant enhancement of bendability was achieved by the introduction of bimodal microstructure for AZ31B alloy sheets via pre-compression and subsequent annealing (PCA) process. This combined treatment led to the c-axis of the extracted samples that were inclined by 30° to the rolling direction (30° sample) further shifting toward the rolling...
To study the microstructural evolution of the as-extruded Mg-6Zn-1Mn alloy sheets with different initial microstructures during high strain rate tensile deformation, the interruptible tensile tests were performed at the strain rate of 1000 s⁻¹, with controlled strain of 2.5%, 7.5% and 12.5%. The microstructure of the samples was characterized by el...
In this work, we investigated the microstructure and the mechanical properties of extruded Mg-xGd-0.5Mn alloys (GMx0) with the variation of Gd content (0, 2, 4, 7 wt%). For the GM00 alloys with no Gd content, the typical basal fiber texture (BFT) was formed, which led to similar mechanical properties to the pure Mg. However, with the dilute additio...
In the current work, we successfully prepared Mg-8Zn-1Mn-3Sn-1.2Gd-0.2Dy alloy with an excellent combination of ultimate tensile strength and ductility. The mechanism of the Dy-modified MgSnGd phase and its effect on the microstructure and mechanical properties of as-cast and as-extruded alloy were systematically investigated. Experimental results...
In this work, the in-situ observation of the microstructure in the Mg-2Gd (wt%) alloys during V-bending tests was operated. The microstructure and texture evolutions were characterized by the in-situ electron backscatter diffraction (EBSD), scanning electron microscopy (SEM) and the high-angle annular dark-field scanning transmission electron micro...
Low alloying Mg-2Gd-0.5(Cu/Ni) alloys for sealing tools in the oil and gas industry were prepared. The differences in the effects of minor Cu and Ni additions on microstructures and properties of the Mg-2Gd alloy were compared. The results showed that adding Ni was more effective than adding Cu in refining grain sizes, strengthening the basal fiber...
Laser surface remelting (LSR) was performed on a Mg-6.2Y (at.%) magnesium alloy to enhance mechanical properties of its surface. The results show that both grains and secondary phase were greatly refined by LSR. The ε phase (Mg24+xY5) was redistributed from α-Mg grain boundaries to interior of the grains. The Y content of ε phase decreased from 14....
The thermodynamic, electronic, and kinetic properties were systematically investigated during the process of Li and Mg atoms into VOCl. The upper limit of Li and Mg intercalation into VOCl is xLi =1 and xMg=0.5, respectively. At high concentration, the further lithiation and magnesiation will cause the phase evolution. The pair correlation function...
Here, the microstructure and mechanical properties are investigated for the designed Mg-4Gd-0.5Zr-xZn (x = 0, 0.2, 0.5, 1.0 and 1.5 wt%) alloys with special emphasis on the effect of Zn. The results show that the designed Mg-4Gd-0.5Zr-xZn alloys exhibit the exceptional ductility. Among them, the Mg-4Gd-0.5Zr-1.0Zn and Mg-4Gd-0.5Zr-1.5Zn alloys show...
Herein, the ZM61 alloys extruded at the extrusion ratios of 39 and 84 are named as ZM61‐39 alloy and ZM61‐84 alloy, respectively. The tensile mechanical properties and microstructure of both ZM61‐39 and ZM61‐84 alloys deformed at room temperature and different high strain rates (100, 500, and 1000 s⁻¹) along extrusion direction (ED) are investigate...
In this paper, the effect of La addition on the Al-RE phase in Mg-Al-Zn-Ce magnesium alloy was studied. Melting method was used to prepare AZ80-Ce magnesium alloys with different La content, and the morphological transformation mechanism of Al-RE phase was proposed by XRD, SEM, EPMA, TEM and extraction. The results show that the Al11RE3 phase can b...
The effects of various Dy addition on the microstructure and mechanical properties of Mg-6Zn-1Mn-3Sn (wt%, ZMT613) alloys were investigated. The results showed significant grain refinement and new MgSnDy phases were detected with Dy addition of the as-cast ZMT613 alloy. A small amount of Dy (≤0.8 wt%) can hinder the proportion of dynamic recrystall...
The compression behavior and microstructure of extruded ZM61 alloy deformed at different high strain rates were investigated. The results show that the yield strength of extruded ZM61 alloy changes just a little in the strain rate range tested in this work, and the ultimate strength and fractured strain increase when the strain rate increases from...
Magnesium (Mg) and its alloys present great potential to be extensively applied in different applications. However, the relatively poor resistance to corrosion and wear significantly restricts their applications in practice. As one of strategies of surface treatment, micro-arc oxidation (MAO) process attracts a lot of attention, since it does not u...
In this work, a novel texture modification, termed the ellipse texture, is introduced by the pre-rolling and subsequent annealing (PRA) process in as-extruded (AE) Mg-Gd-Zn (GZ21) alloy. The static recrystallization (SRX) mechanisms and the evolution of microstructure during the PRA process are investigated by electron backscattered diffraction (EB...
The effect of microalloyed Ca on the microstructure, mechanical properties and aging precipitation of Mg-6Zn-1Mn-4Sn (wt.%, ZMT614) alloy were investigated. The as-cast ZMT614 alloy was mainly composed of α-Mg, Mg-Zn and Mg2Sn phase, and a new CaMgSn phase with high melting point was formed with Ca addition. The CaMgSn phase was easier to form than...
To study the influences of expanding angles on extrusion-shearing-expanding (ESE) process of AZ31 magnesium alloy thin-walled tubes, microstructures and mechanical properties of tubes fabricated by ESE process with different expanding angles 130°, 140°, 150°, respectively, have been investigated by an optical microscope (OM) and an X-ray diffractom...
Dual-phase Mg-Li alloys sheets were rolled at four different temperatures ranging from liquid nitrogen to 300 °C to explore effect of rolling temperature on texture and mechanical properties of the material. Crystal plasticity simulation was utilized to illustrate the influence of slip activity on rolling texture development. The results show that...
In this work, grain size impacted on the bendability of the Mg-2Gd (wt. %) alloy sheets was investigated. The microstructures and textures evolution during the bending test were analyzed by the electron back-scattered diffraction (EBSD) and the scanning electron microscopy (SEM) technique. The results showed an anomalous grain size-dependent bendab...
Corrosion rates of ideal Mg alloys used for sealing tools in petroleum industry should be able to be altered to adapt to different downhole environments, and corresponding mechanisms of modified corrosion rates need to be clarified. In this study, annealing treatments were carried out at 400 or 450 °C for 2 h to tune the microstructures and corrosi...
A new severe plastic deformation for manufacturing Al/Mg bimetallic tube called the TES (tube extrusion shearing) process, which combines direct extrusion with two-step shearing, has been developed to manufacture Al/Mg bimetallic tube. Load evolution with stroke at different temperatures has been simulated by establishing three-dimensional finite e...
This paper focused on the effect of angle α that the basal poles tilted from normal direction (ND) toward the extruded direction (ED) on the formability of as-extruded Mg-2Gd (wt.%) alloy sheets. The studied Mg-2Gd (wt%) alloy sheets with the angle α of 23°, 32° and 45°, respectively, were designed. The Erichsen test was carried out at the ambient...
A dendrite-less Mg anode is coupled with an insertion-type cathode to construct a Mg-Li hybrid ion battery competitive to the state of art Li-ion batteries. However, the issue of limited energy density restricts the practical application of Mg-Li hybrid battery. Herein, it is the first time to assemble an ultrahigh-capacity Mg-Li hybrid battery wit...
The demand for magnesium (Mg) alloy with high elongation, certain strength and good degradation rate used in oil and gas exploitation filed is increasing. Based on Mg-2Gd alloy, effect of copper (Cu) addition (0.25, 0.5 and 0.75 wt.%) on microstructure, mechanical properties and degradation rate were investigated. It showed that more Mg2Cu second p...
Mg-Zn-Sn-Mn alloy is a new type of age hardening wrought Mg alloy. However, the precipitation behavior of the alloy is still not well understood. A solution-treated Mg-6Zn-4Sn-1Mn alloy is selected as the experimental alloy in this paper. The hardening behavior, precipitate microstructure and precipitation sequence of the solution-treated alloy dur...
To research the influence mechanisms of expanding angles on extrusion-shearing-expansion(ESE) process of AZ31 magnesium alloy thin-walled tubes,the effects of different expanding angles on microstructures and mechanical properties of AZ31 magnesium alloy during extrusion-shear-expansion process have been investigated by optical microscope(OM),scann...
To obtain alloys with both high degradability and plasticity used in the petroleum industry, 0.25, 0.5, 0.75 and 1.0 wt.% Cu were added into Mg-2Gd alloy. With Cu addition, finer grain size, precipitation of Mg2Cu, and variations of crystal orientation were observed. Regardless of the good mechanical properties gained by alloying Cu, the degradatio...
Herein, the microstructure and mechanical properties of newly developed Mg-4Gd-0.5Zr-xNd (x = 0, 0.5, 1 and 1.5 wt%) extruded alloys are investigated systematically. All the extruded alloys exhibit the complete dynamically recrystallized (DRXed) microstructure. The addition of Nd weakens the texture and decreases the intensity of double peak textur...
The microstructures and tensile properties of extruded Mg-1Gd-0.5Zn-xCe sheets with various Ce contents (0, 0.3, 0.7 and 1.2 wt%) were investigated at room temperature. Ce addition refined the grain size and resulted in the formation of new Mg12Ce phases. The volume fraction of Mg12Ce phases increased with the increase of Ce additions, which impede...
This paper presents a new forming technology for manufacturing the AZ31 magnesium alloy thin-wall tube. The direct extrusion process and continuous shearing-bending process are combined to produce thin-wall magnesium tube, abbreviated as “TESB” (tube extrusion-shearing-bending). The process has been studied based on the combination of experiments a...
This research studied the mechanisms of Ca and Zn microalloying on the enhancement of ductility of extruded Mg-Gd sheet by combing electron backscattered diffraction and slip trace analysis. The ductility and microstructure of extruded Mg-0.6Gd and Mg-0.6Gd-0.3Ca-0.2Zn (wt%) sheets were investigated. Basal slip was the main deformation mode under i...
Microstructure evolution, dynamic recrystallization (DRX) behavior and mechanical properties of Mg–6Zn–1Mn-xGd alloys (x = 0, 0.2, 1.0 and 3.0 wt%) were investigated. The results showed that the phase components of as-cast Mg–6Zn–1Mn alloy were comprised of Mg7Zn3, α-Mn and α-Mg, while Mg3Zn6Gd (I phase) and Mg3Zn3Gd2 (W phase) were detected with t...
Gas porosity is one of the most detrimental defects that can considerably deteriorate mechanical properties of casting parts. Simulating the interaction between gas porosity and solidifying microstructure is challenging due to multiphase and multiphysical characteristics. In this work, a solid-liquid-gas multiphase-field lattice-Boltzmann model is...
A new severe plastic deformation for manufacturing Al/Mg bimetallic tube called TES (Tube Extrusion Shearing) process, which combines direct extrusion with two step shearing, is developed to Al/Mg bimetallic tube. To explore the deformation mechanism for Al/Mg bimetallic tube during TES process, both experiments and numerical simulations have been...
The microstructure evolution and mechanical properties of AZ31 magnesium alloy during semi-solid extrusion (SSE) has been studied and compared with traditional extrusion (TE). The results show that non-equilibrium crystallization and plastic deformation occur simultaneously in the semi-solid extrusion process. Throughout the SSE process, the nuclea...
Hot tears were frequently formed in Aluminum (Al) parts with complex structure. In this study, OM (optical microscope), SEM (scanning electron microscope), EDS (energy dispersive spectrometer), and FDM (finite difference method) were used to reveal the hot tears mechanisms in the casted AC4B Al engine. Shrinkage porosities with the size of 300–500...
The microstructure evolution and mechanical properties of Mg–6Zn–0.5Ce–xMn (x = 0 and 1 wt.%) wrought magnesium alloys were researched, and the morphologies and role of Mn element in the experimental alloys were analyzed. The research shows that all of Mn elements form the α-Mn pure phases, which do not participate in the formation of other phases,...
The bendability of Mg–Gd binary alloy at room temperature is significantly improved through the pre-compression and subsequent annealing (PCA) process. The results show that the formed angle of PCA sample (36°) is more excellent compared with the as-extruded (AE) sample (115°) during three-point bending test, which is mainly attributed to the varia...
Fusheng Pan (2020): Preparing superhydrophobic nanocomposite coating with SiO 2 nanoparticles on magnesium alloy, Surface Engineering, ABSTRACT Magnesium (Mg) alloys attract a lot of attention owing to their superior properties, while the poor corrosion resistance significantly restricts their extensive applications in practice. The development of...
The microstructure evolution and age hardening behavior of Mg-6Zn-1Mn-4Sn (wt.%, ZMT614) through various Gd addition were investigated. The as-cast ZMT614 alloy was mainly composed of Mg2Sn, Mg7Zn3 and α-Mg solid solution, and new MgSnGd phases were detected with Gd addition. The MgSnGd phase nucleated prior to Mg2Sn during solidification, resultin...
The partial isothermal section of the Mg-Er-Si ternary system in the Mg-Corner at 500°C has been studied through the equilibrated alloy method by using X-ray diffraction analyses and scanning electron microscopy assisted with energy dispersive spectroscopy of X-ray (SEM-EDS). There is convincing evidence for three compounds which have been clarifie...
Here, four representative Mg-3Al-1Zn (AZ31) anodes with different texture characteristics, i.e., ET0°, ET30°, ET60°, and ET90°, are assembled as the anodes for Mg-air batteries. The correlation between texture and discharge products and the influences of texture and discharge products on the discharge performance are studied. The results show that...
The corrosion and discharge behaviors of two Mg-1Y alloys with significantly different grain sizes are studied for application as the anodes for Mg-air batteries in 3.5 wt.% NaCl solution. The correlations between grain size and corrosion and discharge behaviors are also systematically analyzed. The results show that the grain boundaries are the pr...
Compound extrusion (CE) is a newly developed plastic deformation technique which combines direct extrusion (DE) with a two-pass equal channel angular extrusion (ECAE). This paper focuses on the strength, ductility and anti-corrosion properties of an NaCl solution at certain concentrations and the wear-resistance of dry sliding AZ61 magnesium alloy...
In this work, the effect of thermomechanical processing schedules on microstructure, texture and mechanical anisotropy of Mg-1.64Al-0.84Zn-0.38Mn-0.49Ca (AZMX1100, wt.%) alloy was investigated. Two hot rolling regimes: unidirectional and cross rolling (UR and CR, respectively), followed by subsequent annealing, were systematically studied using dif...
The effect of microstructure on the corrosion behavior of as-cast and extruded Mg-Sn-Y alloys was investigated using measurements of hydrogen evolution, weight loss, potentiodynamic polarization, electrochemical impedance spectroscopy, and scanning Kelvin probe force microscopy. The results showed that the corrosion rate increased in the following...
In the current study, the impact of pre-tensile strain (PTS) on twinning and de-twinning behaviors of a low c/a ratio extruded Mg–3Li alloy sheet was systematically investigated by measuring twin characteristic parameters via quasi-in-situ electron backscatter diffraction (EBSD) during subsequent compression and re-compression. The high PTS favored...
Developing high strength magnesium (Mg) alloys without rare earth elements is a long-term goal in the field of light alloys. Herein, it is indicated that addition with Sn in Mg–Zn–Mn–Ca increased the mechanical properties in hot extruded and age treated condition. The results showed that addition of Sn suppressed the formation of Ca2Mg6Zn3 and a ne...
The corrosion behavior at open circuit potential (OCP) and the discharge performance under impressed anodic current of Mg–5Li–3Al–1Zn (LAZ531) alloy sheets with different rolling reductions are investigated using hydrogen evolution, potentiodynamic polarization, electrochemical impedance spectroscopy, and galvanostatic discharge measurements. The r...
The effect of Gd addition on the microstructure and mechanical properties of as-aged Mg–6Zn-1Mn (ZM61) alloy were investigated. The results showed that coarse second phase particles containing both Zn and Gd elements were detected after the addition of Gd element, leading to reduce the amount of Zn available as solutes in the α-Mg matrix. Compared...
The corrosion behavior at open circuit potential (OCP) and discharge properties under applied anodic currents of two α-Mg based Mg-Li alloys, i.e., LAZ131 and LAZ531, with different microstructural features for primary Mg-air batteries are investigated. The results show that the grain boundaries contribute equally to the corrosion and discharge pro...
Compound extrusion (CE) is a newly developed plastic deformation technique which combines direct extrusion (DE) with a two-pass equal channel angular extrusion (ECAE). This paper focuses on the strength, ductility and anti-corrosion properties of an NaCl solution at certain concentrations and the wear-resistance of dry sliding AZ61 magnesium alloy...
Influences of Zn, Ca, and their synergistic additions on the microstructures, tensile properties, and strain hardening behaviors of extruded Mg-1Gd alloy sheets were investigated. The grain size of Mg-1Gd sheet was slightly refined with the sole addition of Zn or Ca, while a striking grain refinement was observed with the synergistic addition of Zn...
The development of Mg-Al-Zn-Mn-Ca series alloys provides a potential prospect to achieve high strength and formability at room temperature (RT). The formation of elliptical annular texture is treated as a crucial factor for the enhanced RT formability. However, the origin of such an elliptical annular texture formation has been rarely reported. Her...
Strain-induced phase transformation in a dual-phase Mg–Li alloy after a severe deformation has been investigated. β-Li phase was transformed into α-Mg phase as a consequence of large strain cold rolling. The morphology and density of the strain-induced phase could be controlled by slip activation in the β-Li phase. A multi-direction rolling procedu...
The contribution of recrystallization and grain growth to the texture evolution in AZ31 alloy and a modified version AZ31+0.5 wt.% Ca was investigated utilizing a multi-step annealing process. The results showed that the addition of Ca triggered a considerable texture modification by increasing the texture spread and decreasing the overall texture...
The effects of Mn addition on the microstructure and mechanical properties of Mg–Zn–Sn alloys have been investigated by optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and uniaxial tensile tests. The results show that the addition of Mn can significantly improve the mechan...
Microstructure evolution of severely cold rolled dual-phase Mg–Li alloy during annealing at various temperatures was systemically investigated. The results showed that severely deformed α-Mg phase can be significantly refined by annealing process. α-Mg phases were first stratified into various layers by phase transformation from α-Mg phase into β-L...
Citations
... In the previous study [26], the AZ31 alloy sheet extruded by the TBE die showed gradient microstructure as well. The grain sizes at the top, middle and bottom layers of this sheet were 11.6 μm, 74.8 μm and 51.1 μm, respectively [34]. The microstructure examination during extrusion revealed that the coarse grains were formed by abnormal grain growth. ...
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... Besides, most cracks appear at the outside surface of the bending sample [14]. Hence, two measures can be adopted to upgrade bendability: 1) improving the plasticity of the sheet so that the materials at the outer side can bear more strain before cracking [15][16][17][18], and 2) regulating strain distribution along the thickness direction, namely inhibiting the migration of neutral layer toward inner side [19][20][21]. The first method has been realized in some studies by alloying and texture modification. ...
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... The last three papers are related to metals and alloys. Zhao et al. 8 studied the effect of different extrusion conditions, such as extrusion ratios and temperatures, on the microstructure, dynamic recrystallization behavior and texture evolution of Mg-6Zn-1Mn-0.2Gd (ZMG610) alloy. ...
... The distribution of blocky LPSO phases in the transverse section is diffuse, occurring at the grain boundaries, while in the longitudinal section, it is elongated along the ED and arranged in a streamline pattern. The blocky LPSO phases tend to coordinate the deformation by twisting and folding under extrusion stress [31,32]. ...
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... Fig. 8 shows IPF maps at the outer surface of the samples observed during the quasi-in-situ bending experiments, and the KAM maps are presented in Fig. 9. The microscopic local strain can be reflected by the density of the geometrically necessary dislocations (ρ GND ) which can be calculated by the equation [44]: (1) where φ is the average KAM value (KAM Ave. ), μ is the scanning step of EBSD measurements with a value of 0.25 μm in this work, and b is the modulus of Burgers vector, which is 0.32 nm [44]. It can be found that the ρ GND which reveals the strain level related to dislocation slip is proportional to the KAM Ave . ...
... Due to its unique twisted NiAs structure, it has VS 2 monolayer building blocks and additional V atoms connecting two adjacent layers, which can provide more potential positions and improve charge transfer in rechargeable batteries. [134,135] Liu et al. proposed the sodium storage mechanism of V 3 S 4 : (i) Na + insertion into V 3 S 4 to form Na x V 3 S 4 (Equation (5)); (ii) conversion reaction where Na + reacted with Na x V 3 S 4 to form Na 2 S (Equation (6)). [82] V 3 S 4 + xNa + + xe − → Na x V 3 S 4 (5) ...
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... He et al. [7] investigated an unusual phenomenon of strain neutral layer (SNL) spreading revealed during the V-bending test. It was found that the SNL on the middle of the symmetrical surface perpendicular to the transverse direction extends to the compression region with a mound-like boundary. ...
... Mg and its alloys often exhibit scarce formability at room temperature, which seriously hinders their applications, despite their attractive properties, such as low density, high specific strength and superior thermal conductivity [1][2][3][4][5]. Bending is a basic deformation behavior occurring at the corners of workpieces during the sheet forming, e.g. ...
... Besides, most cracks appear at the outside surface of the bending sample [14]. Hence, two measures can be adopted to upgrade bendability: 1) improving the plasticity of the sheet so that the materials at the outer side can bear more strain before cracking [15][16][17][18], and 2) regulating strain distribution along the thickness direction, namely inhibiting the migration of neutral layer toward inner side [19][20][21]. The first method has been realized in some studies by alloying and texture modification. ...
... In recent years, scholars have extensively studied various multi-layer composite materials, including Ni-Ti [1], Al-Cu [2,3], Cu-Ni [3], Mg-Al [4,5], and Ti-Al [6]. Among them, the layered metal composite materials involving Mg-Al have received significant attention in the field [7][8][9][10][11]. ...
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