Effect of structure of high entropy CrFeCoNiCu alloys produced by EB PVD on their strength and dissipative properties

Ustinov, А.I.; Demchenkov, S.А.; Melnychenko, T.V.; Skorodzievskii, V.S.; Поліщук, С. С.

doi:10.1016/j.jallcom.2021.161408

Cited by 18 publications

(7 citation statements)

References 32 publications

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“…Similar phenomena should definitely be present also in HEAs. Especially promising from this point of view are HEA thin films [72][73][74][75]. The HEA thin films are usually nanogranied and have, therefore, a high specific density of GBs.…”

Section: Gb Wetting By Second Solid Phase In Primarily Homogeneous He...mentioning

confidence: 99%

Grain Boundary Wetting by a Second Solid Phase in the High Entropy Alloys: A Review

et al. 2021

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In this review, the phenomenon of grain boundary (GB) wetting by the second solid phase is analyzed for the high entropy alloys (HEAs). Similar to the GB wetting by the liquid phase, the GB wetting by the second solid phase can be incomplete (partial) or complete. In the former case, the second solid phase forms in the GB of a matrix, the chain of (usually lenticular) precipitates with a certain non-zero contact angle. In the latter case, it forms in the GB continuous layers between matrix grains which completely separate the matrix crystallites. The GB wetting by the second solid phase can be observed in HEAs produced by all solidification-based technologies. The particle chains or continuous layers of a second solid phase form in GBs also without the mediation of a liquid phase, for example by solid-phase sintering or coatings deposition. To describe the GB wetting by the second solid phase, the new GB tie-lines should be considered in the two- or multiphase areas in the multicomponent phase diagrams for HEAs. The GB wetting by the second solid phase can be used to improve the properties of HEAs by applying the so-called grain boundary engineering methods.

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Section: Gb Wetting By Second Solid Phase In Primarily Homogeneous He...mentioning

confidence: 99%

Grain Boundary Wetting by a Second Solid Phase in the High Entropy Alloys: A Review

et al. 2021

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“…[4] These four core effects can lead HEMs to have distinctive properties compared to conventional ones, but do not solely depend on the number of elements (i.e., the configuration entropy) [14] also the type of elements involved is decisive. Because of these unique effects, HEMs can demonstrate prominent characteristics such as high hardness, [15][16][17][18] good wear resistance, [19][20][21] excellent corrosion resistance, [22][23][24][25] outstanding thermal stability, [26][27][28] excellent oxidation resistance, [29][30][31] and could be utilized in various applications including solar absorbers, [32][33][34][35][36][37] fuel cells, [25,38] thermal barriers, [39,40] diffusion barriers, [41][42][43] lithium-ion batteries, [44] antiglass sticking, [21,45] microdrills, [46] and medical applications. [47,48] HEMs can be used in two forms, as bulk materials and as coatings.…”

Section: Introductionmentioning

confidence: 99%

Atomic Radius Mismatch: A Key Parameter for Design and Synthesis of High‐Entropy Physical Vapor Deposition Coatings—Review

Lotfi‐Khojasteh,

Elmkhah,

Nouri

et al. 2024

Adv Eng Mater

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High‐entropy metal sublattice coatings (HESCs) prepared by physical vapor deposition (PVD) have received attention due to their diverse range of properties and applications. One of the most critical requirements for their synthesis is the prediction and control of their wide‐spread properties, and several efforts have been undertaken using various thermodynamical parameters. The majority of these predictions concentrate on high‐entropy alloys (HEAs) while high‐entropy ceramics (HECs) received little attention. One of the most important parameters to control the structure and properties of HEAs is their atomic radius mismatch (δr), which we apply to crystalline, amorphous, and composite (amorphous matrix, crystalline matrix, and multilayer) HESCs. Based on the relationships between δr and structure, mixing enthalpy (ΔHmix), electronegativity difference (Δχ), ion bonding percentage (IBPHE), mechanical properties (including hardness, H, and Young’s modulus, E), and wear performance descriptors (H/E and H3/E2 ratios) we provide a δr‐based map to aid the design and selection of elements for HESCs.This article is protected by copyright. All rights reserved.

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“…In the previous works, the authors [6][7][8] showed that the method of high-speed electron beam deposition allows producing thin foils from cocrfenicu hea with a rather wide range of micromechanical characteristics, high damping properties and weldability. It was also shown that at high-temperature resistance testing at the temperature of 900 °c in atmospheric air, foils from cocrfeni alloy demonstrate rather high values of high-temperature resistance due to formation of low-defect continuous scale based on cr 2 O 3 oxide on the surface [9].…”

Section: Introductionmentioning

confidence: 99%

Manufacturing honeycomb panels on the base of high-entropy CoCrFeNiSi0.2 alloy foil produced by EB-PVD method

Ustinov,

Falchenko,

Demchenkov

et al. 2023

The Paton Welding J.

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The possibility of manufacturing thin foils of high-entropy alloys (HEA) of Co-Cr-Fe-Ni-Si system by the method of highspeed (up to 10 μm/min) electron beam physical-vapour deposition (EB-PVD) is shown in the work. It was established that silicon content in the alloy composition of approximately 5 wt.% improves the values of high-temperature resistance of basic CoCrFeNi HEA. It is shown that at soaking in air for 28 h at the temperature of 1000 °C the specific change in the weight of cocrfenisi 0.2 sample is not more than 0.9 mg/cm 2 . a technological scheme was proposed of manufacturing by welding three-layer thermal protection honeycomb panels with a low specific weight based on thin foils of high-entropy CoCrFeNiSi 0.2 alloy. It was found that the produced by the proposed scheme three-layer thermal protection panels can stand multiple thermal cycling from 25 to 1000 °c in air without the structure failure. the derived results can be the base for development of the technology of manufacturing lightweight honeycomb structures, capable of ensuring thermal protection of aerospace equipment elements at their interaction with the atmosphere.

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Effect of structure of high entropy CrFeCoNiCu alloys produced by EB PVD on their strength and dissipative properties

Cited by 18 publications

References 32 publications

Grain Boundary Wetting by a Second Solid Phase in the High Entropy Alloys: A Review

Grain Boundary Wetting by a Second Solid Phase in the High Entropy Alloys: A Review

Atomic Radius Mismatch: A Key Parameter for Design and Synthesis of High‐Entropy Physical Vapor Deposition Coatings—Review

Manufacturing honeycomb panels on the base of high-entropy CoCrFeNiSi0.2 alloy foil produced by EB-PVD method

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