Realizing excellent tribological properties of BCC/FCC gradient high -entropy alloy coating via an in-situ interface reaction

Guan, Yajie; Cui, Xiufang; Chen, Di; Su, Wei‐Ming; Zhao, Yao; Li, Jian; Feng, Litong; Li, Xinyao; Jin, Guo

doi:10.1016/j.mtcomm.2023.106098

Cited by 6 publications

(4 citation statements)

References 46 publications

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“…Due to the thermal effect of laser processing, the hardness of the surface micro-nano texture was greater than that of the metal itself. High-hardness abrasive debris would participate in the subsequent friction and wear process, and the resulting ditch effect would increase the wear volume [24]. However, as the contact angle increased, the removal effect of the laser on the material surface increased, the removed surface area increased, and the contact area with the friction piece decreased; therefore, the COF gradually increased [25].…”

Section: Discussionmentioning

confidence: 99%

Effect of Contact Angle on Friction Properties of Superhydrophobic Nickel Surface

Huang,

Zhu,

Zhang

et al. 2023

Photonics

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Due to their excellent performance, superhydrophobic materials have received a lot of attention and research in friction reduction and wear resistance. However, the effect of different contact angles of superhydrophobicity on friction and wear properties has not been thoroughly studied. In this paper, a nanosecond pulsed laser was used to realize the preparation of a superhydrophobic nickel surface, which indeed reduced the coefficient of friction but also increased the wear volume when compared to the unprocessed surface. As the contact angle of the superhydrophobic nickel surface increased, the coefficient of friction gradually increased, and the wear volume decreased gradually in superhydrophobic nickel surfaces. When the laser energy density was 1 J/cm2, the contact angle was 150.3° and the minimum friction coefficient was 0.4. However, when the laser energy density was 50 J/cm2, the maximum contact angle was 156.4° and the minimum wear volume was 4.23 × 107 μm3. The friction direction also influenced the tribological properties of the superhydrophobic-textured surface. This method makes it possible to process superhydrophobic surfaces with more suitable friction and wear properties.

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Section: Discussionmentioning

confidence: 99%

Effect of Contact Angle on Friction Properties of Superhydrophobic Nickel Surface

Huang,

Zhu,

Zhang

et al. 2023

Photonics

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“…For FeCoCrNiAl 1.0 , the number of slip systems of the BCC phase is relatively small, and the grain boundaries slip capacity is lower than that of the FCC phase. [53,54] The motion of the dislocation was more susceptible to locking and viscosity, which made the calculated contribution of dislocation strengthening and grain refinement strengthening of FeCoCrNiAl 1.0 with inevitable errors.…”

Section: Solid Solution Strengtheningmentioning

confidence: 99%

“…However, the existence of grain boundaries also introduced additional stress and energy dissipation, resulting in a decrease in the experimental yield strength. The actual complex grain or grain boundary orientation inside the metals also affects the actual yield strength, [54] but the theoretical yield strength is usually based on the idealized crystal structure, without considering the error of the theoretical values caused by the orientation dislocation. Therefore, for the contribution of grain refinement, the error value was largest on FeCoCrNiAl 1.0 with fine grains and complex orientation.…”

Section: Solid Solution Strengtheningmentioning

confidence: 99%

Strengthening Mechanisms in Bulk FeCoCrNiAl_x (x=0, 0.5, 1.0) High‐Entropy Alloys Fabricated by Laser Melting Deposition

2023

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Herein, FeCoCrNiAl x (x = 0, 0.5, 1.0) high‐entropy alloys (HEAs) are fabricated by the laser melting deposition (LMD) technique. With the increase of Al content, the LMD‐ed microstructure transitions from a single face‐centered cubic (FCC) phase to a dual‐phase structure containing a small amount of body‐centered cubic (BCC) phase (5.3%), and the proportion of the final BCC phase increases significantly to 98.2%. In addition to the compression tests, four strengthening models are used to evaluate the theoretical strength of the three alloys. The addition of Al element as grain refiner can improve the ultimate compressive strength of HEAs; however, the yield strength and plasticity do not improve, as theoretically expected. The FCC phase with more slip systems leads to higher plasticity in the LMD‐ed FeCoCrNi HEA but results in lower yield strength. The LMD‐ed FeCoCrNiAl0.5 HEA exhibits the best combination of strength and plasticity. Therefore, to meet the required service requirements, the content of Al in the FeCoCrNiAl x HEA should be carefully controlled under the premise of considering the actual working conditions.

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“…Since then, researchers have successfully fabricated numerous HEAs using rapid solidification techniques, confirming their ability to form simple solid solution structures during the cooling process [5,[7][8][9][10]. Among these alloys, those containing FCC phases exhibit excellent ductility and fracture toughness [11][12][13][14][15][16], making them widely applicable in engineering practice. However, single-phase FCC HEAs suffer from insufficient strength and their properties can be further optimized.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Characteristics and Microstructure Evolution of CoCrFeNiZr0.3 Hypoeutectic High-Entropy Alloy

Lyu,

Yuan,

Wang

et al. 2024

Metals

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CoCrFeNiZr0.3 is a two-phase coexisting (Laves + FCC) high-entropy alloy with high strength, excellent corrosion resistance, and thermal stability. However, the inhomogeneous distribution of the eutectic structure among the dendrites has a detrimental effect on the coordinated deformation of the material. The current study shows that the grain size, weave structure, and second phase distribution of high-entropy alloys can be significantly changed by thermal deformation, which affects the mechanical and physical properties, as well as the chemical stability of the alloys. In this study, the thermal deformation behavior of CoCrFeNiZr0.3 biphasic hypoeutectic high-entropy alloy was investigated using a Gleeble-3500 thermal simulation tester under the conditions of deformation temperature of 950–1100 °C and deformation rate of 0.001–1 s−1. The results show that CoCrFeNiZr0.3 high-entropy alloy has higher deformation activation energy, which means its deformation resistance is larger. In addition, the microstructure with finer grain size and uniform distribution of Laves phase can be obtained by EBSD analysis after compression at 1000 °C and 0.01 s−1.

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Realizing excellent tribological properties of BCC/FCC gradient high -entropy alloy coating via an in-situ interface reaction

Cited by 6 publications

References 46 publications

Effect of Contact Angle on Friction Properties of Superhydrophobic Nickel Surface

Effect of Contact Angle on Friction Properties of Superhydrophobic Nickel Surface

Strengthening Mechanisms in Bulk FeCoCrNiAl_x (x=0, 0.5, 1.0) High‐Entropy Alloys Fabricated by Laser Melting Deposition

Hot Deformation Characteristics and Microstructure Evolution of CoCrFeNiZr0.3 Hypoeutectic High-Entropy Alloy

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Realizing excellent tribological properties of BCC/FCC gradient high -entropy alloy coating via an in-situ interface reaction

Cited by 6 publications

References 46 publications

Effect of Contact Angle on Friction Properties of Superhydrophobic Nickel Surface

Effect of Contact Angle on Friction Properties of Superhydrophobic Nickel Surface

Strengthening Mechanisms in Bulk FeCoCrNiAlx (x=0, 0.5, 1.0) High‐Entropy Alloys Fabricated by Laser Melting Deposition

Hot Deformation Characteristics and Microstructure Evolution of CoCrFeNiZr0.3 Hypoeutectic High-Entropy Alloy

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Strengthening Mechanisms in Bulk FeCoCrNiAl_x (x=0, 0.5, 1.0) High‐Entropy Alloys Fabricated by Laser Melting Deposition