Microstructural evolution of Al0.25CoCrFeNiCu and Al0.45CoCrFeNiSi0.45 high-entropy alloys during laser cladding

Samoilova, O. V.; Shaburova, Nataliya; Самодурова, М. Н.; Pashkeev, Kirill; Moghaddam, Ahmad Ostovari; Doubenskaia, M.; Sova, A.; Trofimov, Evgeny

doi:10.1177/14644207221084216

Cited by 3 publications

(2 citation statements)

References 39 publications

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“…CoCrFeNi HEA is composed of face-centered cubic (FCC) phases, which have been investigated by numerous researchers [5][6][7]. CoCrFeNi HEA exhibits excellent plasticity, toughness, and fracture toughness, but its application was limited because of low strength.…”

Section: Introductionmentioning

confidence: 99%

Deformation Behavior and Processing Map of AlCoCrFeNiTi0.5 High-Entropy Alloy at High Temperature

Liu,

Li,

Wang

et al. 2023

Coatings

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AlCoCrFeNiTi0.5 high-entropy alloy (HEA) shows excellent properties in hardness and corrosion resistance. AlCoCrFeNiTi0.5 HEA was prepared using a non-consumable vacuum arc furnace. Hot-deformation behavior of AlCoCrFeNiTi0.5 HEA was explored under 1073–1373 K with a strain rate between 0.001 and 1 s−1 using a Gleeble-3800 thermomechanical simulator. The constitutive equation was established using the Arrhenius model, and the deformation activation energy and material constant were obtained. The processing map of HEA within 0.3–0.6 deformation was drawn according to dynamic material model (DMM). The results show that the hot-deformation process of HEA is dominated by work hardening combined with dynamic recovery, and dynamic recrystallization. The flow stress of HEA is significantly affected by deformation temperature and strain rate. The constitutive equation was constructed and verified, and the correlation coefficient of R2 = 0.9873 indicated that the constitutive equation can be used to accurately predict the flow stress of HEA. The processing map of HEA shows that the optimal hot-working process parameters are in the range of temperature 1150–1300 K and strain rate 0.002–0.05 s−1. This work will provide theoretical guidance for the hot-processing of HEA, which effectively promotes the application of the HEA in industry.

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Section: Introductionmentioning

confidence: 99%

Deformation Behavior and Processing Map of AlCoCrFeNiTi0.5 High-Entropy Alloy at High Temperature

Liu,

Li,

Wang

et al. 2023

Coatings

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“…After shot peening, the materials not only have increased wear resistance, but also corrosion resistance and fatigue resistance. The device used for shot peening is simple, so the cost is relatively low and the limitation is small [10][11][12]. Common shot peening includes cast steel shot, cast iron shot, glass shot, etc.…”

Section: Introductionmentioning

confidence: 99%

Simulation and Optimization of Shot Peening Process for CoCrFeNiAlx High-Entropy Alloy

Li,

Gou,

Jiang

et al. 2023

Metals

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In this work, Ti-10V-2Fe-3Al alloy was selected as the test material, and the shot peening process of a CoCrFeNiAlx system high-entropy alloy was simulated based on effective test conditions, and the effects of dry shot peening and wet shot peening on the surface properties were determined. Preliminary simulation results the surface of the test sample display a clear plastic deformation state that gradually diminishes and shifts towards the outermost layer. The stress transfer of the test sample gradually decreases, showing a gradient change, and the twin density also shows a random sample change. Then, the high-entropy alloy shot peening process was optimized, and the best process parameters were determined by analyzing the microhardness data, depth of action layer, and surface state. It was found that after wet shot peening, a new characteristic peak is generated, and with the increase in the size of the shot, its overall kinetic energy becomes increasingly higher, the strain energy of the material surface becomes increasingly higher, and the grain refinement is relatively high. This work provides a new approach to investigating the issues that are present during the shot peening process of CoCrFeNiAlx system high-entropy alloys.

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Al0.25CoCrFeNiV High Entropy Alloy Coating Deposited by Laser Cladding on Stainless Steel

et al. 2022

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This paper studies the microstructure, composition and properties of a Al0.25CoCrFeNiV high entropy alloy coating (HEAC) deposited by laser cladding on austenitic-grade stainless steel. Laser cladding was carried out in an argon atmosphere on a FL-Clad-R-4 laser metal deposition complex with the following parameters: the laser power was 1400 W, the spot diameter was 3 mm, the track displacement was 1.2 mm, and the scanning speed was set to 10 mm/s. A change in the microstructure of the coating after laser cladding was revealed in comparison with as-cast high entropy alloy (HEA) Al0.25CoCrFeNiV. A significant decrease was found in the size of vanadium precipitates, from 20–40 µm in the as-cast state to 1–3 µm after laser cladding. A change in microhardness over the thickness of the coating from 370 HV0.3 at the outer surface to 270 HV0.3 at the boundary with the substrate was established, which may be due to the diffusion of Fe from the stainless steel into the coating material during laser cladding. Despite these features, the resulting coating adheres tightly to the substrate, and has no cracks or other defects, which indicates the possibility of using laser cladding to create coatings from high entropy alloys.

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Microstructural evolution of Al_0.25CoCrFeNiCu and Al_0.45CoCrFeNiSi_0.45 high-entropy alloys during laser cladding

Cited by 3 publications

References 39 publications

Deformation Behavior and Processing Map of AlCoCrFeNiTi0.5 High-Entropy Alloy at High Temperature

Deformation Behavior and Processing Map of AlCoCrFeNiTi0.5 High-Entropy Alloy at High Temperature

Simulation and Optimization of Shot Peening Process for CoCrFeNiAlx High-Entropy Alloy

Al0.25CoCrFeNiV High Entropy Alloy Coating Deposited by Laser Cladding on Stainless Steel

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