Microstructure and Mechanical Properties of CoCrFeMnNiSnx High-Entropy Alloys

Gu, Xianyu; Dong, Yun; Zhuang, Yanxin; Wang, J.

doi:10.1007/s12540-019-00328-w

Cited by 29 publications

(4 citation statements)

References 39 publications

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“…In Table S1 (Supporting Information), The VEC of NiCdCuInZn high‐entropy alloy is 7.6, which is more inclined to form FCC single phase. [ 39 ] During the initial heating process, the Ni/Cd/Cu/In/Zn mixed metal precursors decomposed first, and then the reduced metal clusters were bonded and confined on the carbon fiber surface. At relatively low temperatures of 500 ∼ 800 °C, the metal elements with small atom radius differences prefer to form alloy phases.…”

Section: Resultsmentioning

confidence: 99%

Ultra‐Sleek High Entropy Alloy Tights: Realizing Superior Cyclability for Anode‐Free Battery

Wang,

et al. 2023

Advanced Materials

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The development of Li‐free anodes to inhibit Li dendrite formation and provide high energy density Li batteries is highly applauded. However, the lithiophobic interphase and heterogeneous Li deposition hindered the practical application. In this work, a 20 nm ultra‐sleek high entropy alloy (HEA, NiCdCuInZn) tights loaded with HEA nanoparticles are developed by a thermodynamically driven phase transition method on the carbon fiber (HEA/C). Multiple Li+ transport paths and abundant active sites are enabled by the cocktail effect of different constituent elements in HEA. These active sites with gradient absorption energies (−3.18 to −2.03 eV) facilitate selective binding, providing a low barrier for homogeneous Li nucleation. Simultaneously, multiple transport paths promote Li diffusion behavior with uniform Li deposition. Thus, the HEA/C achieves high reversibility of Li plating/stripping processes over 2000 cycles with a coulombic efficiency of 99.6% at 5 mA cm−2/1 mAh cm−2 in asymmetric cells, as well as over 7200 h at 60 mA cm−2/60 mAh cm−2 in symmetric cells. Moreover, the anode‐free full cell with the HEA/C host has an average coulombic efficiency of 99.5% at 1 C after 160 cycles. This advanced HEA structure design shows a favorable potential application for anode‐free Li metal batteries.

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Section: Resultsmentioning

confidence: 99%

Ultra‐Sleek High Entropy Alloy Tights: Realizing Superior Cyclability for Anode‐Free Battery

Wang,

et al. 2023

Advanced Materials

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“…The first scientific studies on the subject were published in 2004 by Yeh et al [1] and Cantor et al [2] started with the ideas of preparing equal or nearly equal multicomponent alloys [3]. HEAs usually contain 5-13 main elements, and the concentration of each element that makes up the alloy is between 5 and 35% [4][5][6][7]. HEAs, compared to traditional alloys, exhibit characteristics such as low and high temperature stability, machinability, corrosion resistance, high strength, and superior wear resistance [8,9].…”

Section: Introductionmentioning

confidence: 99%

Effects of Selective Laser Melting Process Parameters on Structural, Mechanical, Tribological and Corrosion Properties of CoCrFeMnNi High Entropy Alloy

Bulut,

Yıldız,

Varol

et al. 2024

Met. Mater. Int.

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The structural, tribological, mechanical, corrosion, and other properties of materials produced by laser-based powder bed fusion additive manufacturing methods are significantly affected by production parameters and strategies. Therefore, understanding and controlling the effects of the parameters used in the manufacturing process on the material properties is extremely important for determining optimum production conditions and for saving time and materials. This study aimed to determine the optimal laser parameter values for CoCrFeMnNi high-entropy alloy powders using the selective laser melting (SLM) method. The layer thickness was kept constant during experimentation. 5 different laser powers and 10 varying laser scanning speeds were tested, with hatch spacing from 30 to 90%. After determining the optimal laser parameters for SLM, prismatic samples were fabricated in different build orientations (0°, 45°, and 90°), and subsequently, their structural, mechanical, tribological, and corrosion properties were compared. Melt pool morphology could not be obtained at 20—40 and 60W laser powers and at all laser scanning speeds used at these laser powers. At 100 W laser power, 600 mm/s laser scanning speed, and 70% hatch spacing parameters, an ultimate tensile stress of 550 MPa and elongation of 48% were obtained. Among the samples produced in different build orientations, the sample produced with a 0° build orientation exhibited the highest relative density (99.94%), the highest microhardness (201.2 HV0.1), the lowest friction coefficient (0.7025), and the lowest wear and corrosion rates (0.7875 mpy). Additionally, SLM parameters were evaluated to have a significant impact on the performance of all properties of the samples. Graphical Abstract

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“…Mo element is beneficial to the formation of σ phase in the alloy and increases the compression resistance yield strength [ 27 ]. The addition of Sn increases the hardness and strength of as-cast alloy [ 28 ]. Nd also has a similar effect on the rolled alloy [ 29 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Ti Content on the Microstructure and Properties of CoCrFeNiMnTix High Entropy Alloy

Chen

Liu

Wang

et al. 2022

Entropy

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The aim of this study was to investigate the effects of the Ti element addition on the microstructure and properties of CoCrFeNiMn high entropy alloys. The Ti element modified CoCrFeNiMnTix high entropy alloys were prepared by vacuum arc melting processing. The Ti rich body-centered cubic structure phase was observed in CoCrFeNiMnTi0.25 and CoCrFeNiMnTi0.55 instead of a simple face-centered cubic structure in CoCrFeNiMn. The amount of the Ti-rich phase depicted an increasing trend with increasing Ti content. Simultaneously, the mechanical properties of CoCrFeNiMnTix were obviously improved. When the Ti content is 0, 0.25 and 0.55, the microhardness is 175 HV, 253 HV and 646 HV, which has an obvious increasing trend, while the ductility decreased. The tensile properties show a trend of first strengthening and then decreasing, changing from 461 MPa to 631 MPa and then to 287 MPa. When x was 0.55, the solid–liquid transition temperature of the alloy decreased, and the melting temperature range increased.

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Microstructure and Mechanical Properties of CoCrFeMnNiSnx High-Entropy Alloys

Cited by 29 publications

References 39 publications

Ultra‐Sleek High Entropy Alloy Tights: Realizing Superior Cyclability for Anode‐Free Battery

Ultra‐Sleek High Entropy Alloy Tights: Realizing Superior Cyclability for Anode‐Free Battery

Effects of Selective Laser Melting Process Parameters on Structural, Mechanical, Tribological and Corrosion Properties of CoCrFeMnNi High Entropy Alloy

Effect of Ti Content on the Microstructure and Properties of CoCrFeNiMnTix High Entropy Alloy

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