Structure and Properties of Nanostructured Metallic Glass of the Fe–B–Co–Nb–Ni–Si High-Entropy Alloy System

Kushnerov, O. I.; Башев, В. Ф.; Ryabtsev, S. I.

doi:10.1007/978-3-030-51905-6_38

Cited by 7 publications

(7 citation statements)

References 20 publications

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“…Thus, the simulation results, as well as the experimental results, generally confirm the validity of the above criteria, except for the VEC parameter. But, if the value of VEC is close to the boundary values, predictions of the phase compositions sometimes do not work [5].…”

Section: Fig 2 Snapshot Of Alcocufeni Thin Film Sliced Along the Subs...mentioning

confidence: 99%

“…Due to the high mixing entropy, multicomponent HEAs typically consist of simple solid solutions with face-centered cubic (FCC) or body-centered cubic (BCC) lattices. Many HEAs possess unique properties, such as wear-resistance, resistance to corrosion and oxidation, radiation resistance, high hardness, and strength [1][2][3][4][5]. Thus, the HEAs may find use as materials for nuclear reactors applications, medicine, electronics devices, mechanical equipment, rocket casings, engines etc.…”

Section: Introductionmentioning

confidence: 99%

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Computer simulation of AlCoCuFeNi high-entropy alloy thin film deposition and crystallization

Kushnerov

2022

JPhysElectron

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The processes of deposition and crystallization of high-entropy AlCoCuFeNi alloy thin film on a substrate of silicon (100) are studied by classical molecular dynamics simulation. Total simulation time reaches 50 ns. The embedded atom model is used to describe the interaction among Al–Co–Cu–Ni–Fe. Interaction between the atoms of Al, Co, Cu, Fe, Ni, and the Si substrate is described using the Lennard–Jones potential, and the interaction between the silicon atoms was modeled using the Stillinger–Weber potential. It is found that at the first stage of deposition small clusters are formed and the process of crystallization starts after ~ 5 ns of simulation, at the characteristic sizes of clusters of about 2 nm. At the end of the simulation, after the 50 ns of modeling, the simulated film contains a face-centered cubic phase, a body-centered cubic phase, a hexagonal close-packed phase, and an amorphous phase. An analysis of the radial distribution of atoms makes it possible to determine the distances between the nearest neighbors and estimate the lattice parameters of these phases.

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Section: Fig 2 Snapshot Of Alcocufeni Thin Film Sliced Along the Subs...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Computer simulation of AlCoCuFeNi high-entropy alloy thin film deposition and crystallization

Kushnerov

2022

JPhysElectron

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“…The development of quenching methods has led to growing interest in materials with thermodynamically nonequilibrium structures worldwide. In these methods, the cooling rate of the melt reaches values above 10 4 K/s, due to which a wide range of metastable structural states is formed in the alloys, including nanocrystalline and amorphous, with unique sets of properties [5,6]. Due to this, quenching from the liquid state is a promising method for obtaining HEAs with improved characteristics.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, phase formation, and properties of melt-quenched CoCr0.8Cu0.64FeNi high-entropy alloy

Kushnerov,

Ryabtsev,

Bashev

2023

J. Phys. Electron.

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This paper explores the CoCr0.8Cu0.64FeNi high-entropy alloy. Different criteria, such as the valence electron concentration, the Ω parameter, and the atomic size difference δ, are used to estimate the phase composition of the alloy. As-cast samples of the alloy are made by melting the components in a high-temperature Tamman furnace in an argon flow and solidifying them in a copper mold. The weight loss during the ingot production is minimal, and the average cooling rate is about 102 K/s. Melt-quenched samples are made by remelting the cast ingot and rapidly cooling the melt droplets on the inner surface of a fast rotating (about 8000 rpm) hollow copper cylinder. The cooling rate, estimated from the film thickness, is about 106 K/s. X-ray diffraction is used to analyze the structure of the samples on a DRON-2.0 diffractometer with monochromatic Cu Kα radiation. Magnetometry is used to measure the magneticproperties of the samples at room temperature. The results confirm the theoretical predictions that the structure of the alloy, in both states, is an FCC solid solution. The lattice parameters in the as-cast and melt-quenched states are 0.3593 nm and 0.3589 nm, respectively. The results also show that the CoCr0.8Cu0.64FeNi alloy is a soft magnetic material, but its coercivity and microhardness increase after quenching due to internal stresses.

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“…The development of HE-MGs alloys was the basis for new methods of development and manufacturing of MGs. The HE-MGs (as happens with substances that simultaneously belong to different types of materials [10,11]) have excellent physical and mechanical properties combining the advantages of both metallic glasses and high-entropy alloys [12]. Therefore, HE-MGs exhibit considerable potential for various applications.…”

Section: Introductionmentioning

confidence: 99%

The effect of cooling rate on structure and mechanical properties of Co-Cr-Cu-Fe-Ni-Sn high entropy alloys

Kushnerov

Башев

2021

JPhysElectron

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The paper examines the structure and mechanical properties of multicomponent high-entropy CoCrCuFeNiSnx alloys in as-cast and splat-quenched states. The compositions of investigated alloys is analyzed by using the criteria for predicting the phase composition of high-entropy alloys available in the literature, based both on calculations of the entropy and enthalpy of mixing and on an estimate of the difference between the atomic radii of the component. The alloy films is fabricated by the known technique of splat-quenching. A cooling rate estimated by a film thickness is ~ 106 K/s. The simultaneous formation of two solid solutions (FCC + ordered BCC) has been established in the alloy structure. An increase in the concentration of Sn favors the formation of the ordered (В2 type) solid solution in the structure of the alloys. High values of the microhardness and dislocation density have been obtained in the splat-quenched samples. It is also shown that an increase in the Sn content positively affects the microhardness.

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Structure and Properties of Nanostructured Metallic Glass of the Fe–B–Co–Nb–Ni–Si High-Entropy Alloy System

Cited by 7 publications

References 20 publications

Computer simulation of AlCoCuFeNi high-entropy alloy thin film deposition and crystallization

Computer simulation of AlCoCuFeNi high-entropy alloy thin film deposition and crystallization

Microstructure, phase formation, and properties of melt-quenched CoCr0.8Cu0.64FeNi high-entropy alloy

The effect of cooling rate on structure and mechanical properties of Co-Cr-Cu-Fe-Ni-Sn high entropy alloys

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