Dynamic recovery (DRV) and dynamic recrystallization (DRX) of hexagonal materials during hot deformation is a sub-domain of restoration processes, which has not well been addressed. In this work, the DRV and DRX mechanisms of high-temperature α phase in TiAl alloys were thoroughly investigated by microstructural characterization and crystallographic analysis with an extended intragranular misorientation

The influence of mechanical alloying (MA) and spark plasma sintering (SPS) processing parameters on the microstructure, magnetic and mechanical properties of Finemet (Fe73.5Cu1Nb3Si13.5B9) type alloys was investigated. Finemet alloy powder was obtained via mechanical alloying of elemental powders for 30 h, 60 h, 90 h, and 120 h with ball to powder ratio (BPR) of 10:1 and 15:1. The milled powders were

Ce3-xRhGa10+3x (x = 0.36) is a new member of the linear intergrowth structure series built up from segments of the BaAl4, AlB2 and CaF2 structure types. The compound crystallizes with a disordered variant of the Pr3NiGa10 type structure. Unlike the prototype, Ce3-xRhGa10+3x exhibits notable deficiency in rare-earth content, accompanied with significant excess of Ga atoms, corresponding to additional

In order to improve the functional stability of Ti-50.8 at.% Ni alloys, a new plastic deformation method and device suitable for sheets or wires was developed in this work, called “stretching-bending deformation (SBD)”. After SBD process, aging treatments were carried out at various temperatures (523–823 K) and various durations (0.5–12 h) to explore the effects of SBD process and aging treatment on

A refractory high-entropy alloy (HEA) coating with a composition close to MoFeCrTiWAlNb3 was fabricated by laser cladding on M2 high-speed steel. The as-cladded coating is mainly constituted by body-centered-cubic (BCC) solid solution, MC carbide and C14-Laves phase, and exhibits typical lamellar eutectic. To explore its performance at elevated temperature, these samples were annealed at 950 °C for

The 1/2 < 11_0]{111} ordinary dislocations play an important role in the mechanical behaviors of L10 alloys. The core of this kind of dislocations has asymmetric four-fold nonplanar structure spreading onto two equivalent {111} planes, which makes the traditional planar core structure based Peierls-Nabarro (P–N) model inappropriate to describe the dislocation properties. Under this context, an improved

An efficient, economical and reusable Fe-based metallic glass (MG) powders were prepared for degrading Orange II solution. The influence parameters such as initial pH, temperature, recycle times and initial Orange II concentration were investigated for the degradation efficiency. The experimental result shows that 98.6% degradation rate was achieved within 2 min using low dosage Fe–Si–B–P–C glassy

We investigated the influence of magnetic field on the corrosion performance of Al-3.0 Mg-xRE/Fe alloys using microstructure observation, immersion test, electrochemical measurement, and pH and conductivity tests. The effects of both magnetic field and the change in the solution properties on the corrosion performance of Al-3.0 Mg alloy with different phases were discussed. The results indicated that

The effect of severe warm-rolling on the microstructure and texture development in FCC equiatomic CoCrFeMnNi HEA was investigated in the present work. For this purpose, the HEA was warm-rolled to 90% reduction in thickness at 600 °C and annealed for 1 h at temperatures up to 1200 °C. To highlight the effect of warm-rolling, a critical comparison was made with similarly deformed and annealed cold-rolled

The structural, magnetic, and magnetocaloric properties of the Ni54(FeMn)19Ga27 Heusler alloy have been presented, which has both Fe and Mn atoms at the 4a site of its austenite structure. The alloy is compared with the ternary alloys of the Ni54Fe19Ga27 and the Ni54Mn19Ga27. The alloy has a mixed-phase, which is L21 cubic and 14 M tetragonal at room temperature. The temperature-dependent magnetization

We report the magnetic properties of CaFe2As2, CaFe1·9Pt0·1As2, and Ca0·9La0·1Fe1·9Pt0·1As2 compounds in a wide temperature range of 5–300 K in the field up to 9 T. We have observed a well-defined anomaly in the resistivity around 165 K, which manifests clearly a well-known first order magneto structural phase transition from paramagnetic-tetragonal (T) state to antiferromagnetic orthorhombic (Ort)

TixAlCoCrFeNi2.1(x = 0, 0.1, 0.15, 0.2) high entropy alloys (HEAs) were obtained by vacuum arc melting followed by suction casting. The influences of traces of Ti addition on the microstructure morphology, average phase fraction, phase orientation relationship (OR) were investigated employing X-ray diffraction (XRD), scanning electron microscopy (SEM) equipped with energy-dispersive spectroscopy (EDS)

This paper presents the first comprehensive study on additive manufacturing of a high-melting near-eutectic Mo–Si–B alloy by laser powder bed fusion (L-PBF). An overview about the ambient and high temperature material properties of a Mo-16.5Si-7.5B alloy is given. Therefore, the near-eutectic Mo–Si–B alloy was gas atomized and the powder was analyzed. After developing suitable process parameters for

The application of high entropy alloy (HEA) as coating materials has become a research hotspot. The combination of laser cladding technology and ultrasonic impact treatment (UIT) may provide an opportunity for better performance of HEA and it is possible to enhance the application prospect of HEA. To research the effects of UIT on microstructure and properties of laser cladded HEA coating, AlCoCrCuFeNi

Phase diagram calculation of Fe–Ti system is obtained by coupling of CALPHAD with first principle methods. Single Gibbs energy model is used for FeTi to take care of order-disorder transition. First principle calculation shows that Laves phase is ferromagnetic nature with the magnetic moment of 1.417μB which is incorporated in the modelling. For extrapolation to higher order system, Laves phase is

Understanding the microstructure evolution of precipitates in metallurgical grade silicon (MG-Si) has vital research significance and industrial application. In this work, the evolution of precipitate distributions and morphology was systematically investigated in silicon during cooling through the quenching process. The results show that the micro-segregation of precipitates is mainly concentrated

Ytterbium (Yb)- and silicon (Si)-rich ytterbium silicides (Yb5Si3, and Yb3Si5) were successfully fabricated by arc-melting and heat treatment. The degradation behavior of both silicides was evaluated by means of oxidation tests under three different conditions: Air, air-H2O, and steam. The results showed that the degradation of these Yb-silicides in air was accelerated relative to that in air–H2O and

The effect of carbon addition and cooling rate on the lamellar structure of peritectic Ti-46.5Al–5Nb-0.2B-0.2C (at.%) alloy was studied. The studied alloys with a carbon content of 0.2, 0.5, 0.7 and 1.0 at.% were prepared by vacuum induction melting in graphite crucibles. The as-cast samples were subjected to solution annealing in a single α (Ti-based solid solution) phase field followed by cooling

Highly porous Ti-40Zr-8Nb-2Sn (at.%) shape memory alloy scaffolds were prepared by fiber metallurgy using rapidly solidified alloy fibers for the application of cancellous bone replacement. The phase constituents of alloy fibers and scaffolds were investigated by means of X-ray diffraction (XRD), superelastic behavior of alloy fibers was investigated by means of the dynamic mechanical analyzer (DMA)

The physical properties of the cubic Laves phase superconductor ThIr2 have been studied by resistivity, magnetic susceptibility and thermodynamic measurements. This compound is found to be a weak coupling type-II superconductor with a Tc of 5.58 K and a fully isotropic superconducting gap. The electronic specific heat coefficient, upper critical field and Ginzburg-Laudau parameter are determined to

The interface structure of {22‾01} α2-Ti3Al deformation twins formed during tensile deformation of polysynthetically twinned (PST) TiAl single crystals at 900 °C has been studied systematically by aberration-corrected scanning transmission electron microscopy. Numerous superlattice intrinsic stacking faults (SISFs) are formed on the (0001) basal plane of α2 twins, thereby resulting in the formation

Be12Ti is a leading candidate neutron-multiplier material for fusion breeder blankets; yet the evolution of the crystal defects under irradiation is poorly understood. Here, the migration of intrinsic defects in tetragonal Be12Ti was predicted using atomic scale computer simulation. Transport of titanium and beryllium through the interstitial, interstitialcy and vacancy-mediated models was considered

Samples of a TiNiSn half-Heusler thermoelectric alloy were prepared using arc melting and rapid solidification by planar flow casting. On the one hand, arc melted samples show multiple phases and need long annealing time to be homogenized into a single phase. On the other hand, rapidly solidified samples show an almost single phase, with a grain refined microstructure. This result is a consequence

Cr–Mn–Ni ternary alloys have been experimentally studied. Three different isothermal sections have been characterized at 1000 °C, 1100 °C and 1200 °C via Metallography, X-ray diffraction (XRD) and electron probe micro analyzer (EPMA). The results are summarized as follows: (1) the solubility of Ni in the bcc-(Cr) phase was small; (2) the solubility of Ni in bcc-(Cr) phase slightly increases as the

The cryogenic magnetic properties and magnetocaloric effects of Er3Ni2-type Nd3Rh2 (space group R-3, N148, hR45), and Y3Rh2-type RE3Rh2 (RE = Ho, Er) (space group I4/mcm, N140, tI140) have been investigated in detail. For the Nd3Rh2 compound, two second-order magnetic transitions, a ferromagnetic-antiferromagnetic transition followed by an antiferromagnetic-paramagnetic transition with temperature

The orientation, hardness and Young's modulus of Al3Yb single crystal were analyzed using the electron back scatter diffraction (EBSD) and nanoindentation techniques, combined with the first principles calculations. The Al3Yb single crystal of about 1 mm size could be obtained by heating hypereutectic Al-38.5 (wt%)Yb alloy to liquid state and cooling to room temperature at 60 °C/h. The results showed

High-entropy alloys (HEA) represent potentially disruptive materials across multiple industries, especially for refrigeration technologies. Building metal components layer-by-layer increases design freedom and manufacturing flexibility, thereby enabling high magnetic thermal properties of the multicomponent alloy. However, excessive alloying elements could limit the mass production potential, while

The anomalous staircase-like magnetization behavior has been investigated in a Fe–Mn-Ga magnetic shape memory alloy. Here, we elucidate the underlying mechanism for such anomalous magnetic behavior is caused by the magnetic-field-induced structural transformation occurring at low temperature. The reversal of structural phase transformation in a sufficient thermodynamics area is accounted for the abrupt

In this paper, the effect of severe plastic deformation (SPD) induced by high-pressure torsion (HPT) and isothermal heat treatment (HT) below the glass transition on the structure-property relationships of Cu46Zr46Al8 bulk metallic glass (BMG) is assessed separately and alternately in reference to the as-cast state. Pronounced modifications are confirmed by X-ray diffraction, differential scanning

The solidification process of Ti45Al2Nb2Ta0.8B (B4522Ta) and Ti45Al2Nb2Hf0.8B (B4522Hf) Bridgman samples were studied through directional solidification. Boron addition at 0.8 at. % was found to have changed the orientation relationship of peritectic α with β dendrites. The peritectic alpha is randomly oriented in both B4522Ta and B4522Hf, it was likely to be inoculated by boride precipitates at the

C-doped Fe2MnGaCx (x = 0, 0.05, 0.1 and 0.2) alloys have been synthesized and the influence of carbon on the structure and magnetic properties of Fe2MnGa has been investigated. The doping of C can expand the lattice of Fe2MnGa, suggesting that it enters the interstitial site of FCC lattice. The ferromagnetic coupling in Fe2MnGaCx can be strongly enhanced with increasing C content. The ferromagnetic

In this work, we report a (Ni50.1Ti34.9Hf15)85Nb15 alloy that shows excellent cold workability and good high-temperature shape memory effect. The as-cast sample shows eutectic microstructure consisting of β-Nb and the NiTiHf(Nb) matrix. The homogenized (Ni50.1Ti34.9Hf15)85Nb15 alloy shows high compressive fracture strain of 40% and excellent cold-rolling reduction ratio of 80%. It is suggested that

The effect of the annealing temperature of a Ti-50.9 at.% Ni nanocrystalline alloy with an inhomogeneous grain/subgrain structure on Ti3Ni4 precipitation was investigated. The evolution of sizes, morphology, and spatial distribution of Ti3Ni4 particles after annealing at 300 °C, 400 °C and 500 °C studied. Found that Ti3Ni4 particles nucleate by a heterogeneous mechanism predominantly in the substructure

Novel AlCrFeNiNb0.3 high entropy alloy (HEA) was cast, heat treated and thoroughly investigated. This alloy exhibits microstructural stability up to 1300 °C and exceptional high hardness values. It is plausible to assume that the reason for these results is relatively large amount of intermetallic phases appearing in this alloy. AlCrFeNiNb0.3 solidifies dendritically. The interdendrite region exhibited

The anti-phase boundaries (APBs) in the T (Al20Cu2Mn3) phase and the interfaces of the T phase with an Al matrix were observed. The effects of pre-deformation on the precipitation behavior of T phase and hardening behavior of alloy were investigated by hardness measurement, mechanical tensile test, transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM).

Herein, we provided a facile route to coat a flat and uniformly covered reduced graphene oxide (RGO) film on Ti1.4V0.6Ni quasicrystal alloy electrode surface by electrodeposition of graphene oxide and subsequent reduction with HI vapor. Raman spectrum showed HI has a better reduced effect than electrochemical reduction. The RGO coated alloy electrode exhibited a higher discharge capacity of 290.3 mA h

In this study, the first attempt was made to synthesize a Ti–Au alloy by fusing two titanium plates and a thin gold foil between them using the small-scale resistance spot welding procedure. The main goal was to study the possibility of controlling the alloy synthesis process by predefined thermal cycles (metal heating and its cooling rate). The Ti–Au alloy microstructure, chemical and phase compositions

The hot deformation behaviour and microstructure evolution of TiAl-based alloy with nominal composition Ti-43Al-8Nb-3.6C-0.7Mo (at.%) reinforced with carbide particles were studied. The compression tests were carried out in the temperature range from 900 to 1000 °C and strain rates from 0.0001 to 0.01 s−1 up to a true strain of 0.5. The microstructure of the compression specimens was characterised

Mg-rich intermetallic NdNiMg5 in orthorhombic phase with space group Cmcm (No. 63) has been studied theoretically using hybrid functional (HF–B3PW91) within the frame work of density functional theory (DFT). The calculated structural parameters and geometries are found in good agreement with the experiments. The electronic properties of the material reveal the metallic nature. Nd 4f-states splitting

A series of NbC/FeCrNiCu high entropy alloy matrix composites (2.5, 5, 7.5 and 10 vol% of NbC) were prepared by vacuum induction melting. The microstructures and mechanical properties of the composites were investigated using X-ray electron diffraction, scanning electron microscopy, transmission electron microscopy, tensile and hardness tests. The results show that the FeCrNiCu high entropy alloy matrix

Mg3GeNi2 hydrogen storage electrode alloy was synthesized successfully via mechanical milling followed by sintering, and its electrochemical performance as the negative electrode material in a nickel-metal hydride (Ni-MH) battery was studied for the first time. Then, different amounts of nano-nickel were added to the selected alloy with the pre-milling duration of 60 h to further improve the electrochemical

The polycrystalline intermetallic vanadium carbide (V8C7) is successfully synthesized and investigated as an electrode material for electrochemical capacitors. The V8C7 electrode has a large specific capacitance of 161.7 F g−1 in 1.0 mol L−1 Na2SO4 at a specific current density of 1 A g−1 and remains 92.8% of this value after 10,000 cycles. 83.3% of the initial value can maintain even at a high current

The effects of Co content on the thermal stability, soft-magnetic properties, corrosion resistance and mechanical properties of (Fe1-xCox)86Ni1B13 (x = 0–0.25) amorphous alloys were systematically investigated. Adequate Co addition can significantly increase saturation magnetic flux density (Bs). Extremely high Bs of 1.78–1.92 T was obtained when Co content was added in the range of x = 0.05–0.25.

Due to the intrinsic brittleness of NiAl alloy, its sheets are difficult to fabricate with traditional casting and rolling methods. To solve this problem, a novel NiAl alloy sheet with a special bimodal laminated structure was successfully designed and fabricated via the in-situ solid-state reaction synthesis using pure Ni and Al foils. The mechanical properties of the bimodal laminated NiAl alloy

High Nb-containing TiAl alloys have been widely developed and researched due to low density, high specific strength and stiffness, oxidation, and creep resistance. Nevertheless, high Nb-containing TiAl alloys demonstrate poor machinability owing to low plasticity and ductility. Accordingly, on basis of Kalidindi and Pathak's model, this paper systematically establishes a high-throughput and convenient