Microstructure and properties of W–4.9Ni–2.1Fe heavy alloy with Dy2O3 addition

Xie, Yuan-Feng; Zhou, Liangliang; Zhang, Xiaoyong; Li, Xiaoxian; Zhou, Zenglin; Zhang, Xuehui

doi:10.1007/s12598-019-01246-x

Cited by 11 publications

(3 citation statements)

References 23 publications

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“…The intensity of the FCC diffraction peak gradually decreases due to the diffuse reflection effect as the diffraction angle increases and the intensity of the diffraction peak decreases. [19,20].…”

Section: Xrd Diffraction Results and Analysis Of Coatingmentioning

confidence: 99%

“…With the increas Cu content, the solid solution degree of Cu atoms in the alloy gradually increases, a there is a certain difference in the size of each atom in the alloy component, which le to the increase in lattice distortion and the shift of diffraction angle to a lower angle. T intensity of the FCC diffraction peak gradually decreases due to the diffuse reflection fect as the diffraction angle increases and the intensity of the diffraction peak decrea [19,20]. The figure shows that the phase structure of laser cladding Al0.7FeCoCrNiCux hi entropy alloy coating comprises only body-centered cubic (BCC) phase and face-cente cubic (FCC) phase.…”

Section: Xrd Diffraction Results and Analysis Of Coatingmentioning

confidence: 99%

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Study on the Corrosion Resistance of Laser Clad Al0.7FeCoCrNiCux High-Entropy Alloy Coating in Marine Environment

Lü

2022

Coatings

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In the marine atmosphere, the corrosion rate of ship components is 4–5 times higher than that of the inland atmosphere. To solve the serious corrosion problem arising from long-term service in the marine environment of naval aircraft and ships, etc., this paper takes Al0.7FeCoCrNiCux system high-entropy alloy coating prepared by laser melting technology with 5083 aluminum alloys as the base material and analyzes the aging and failure mode of equipment coating under a marine atmospheric environment. XRD and SEM were utilized to study the microscopic morphological structure of the coatings. The laws of influence of Cu elements on the electrochemical corrosion behavior of the Al0.7FeCoCrNiCux system high-entropy alloy in 3.5 wt.% NaCl neutral solution was investigated by using dynamic potential polarization and electrochemical impedance spectroscopy, and neutral salt spray acceleration tests and outdoor atmospheric exposure tests were carried out. The results show that the Al0.7FeCoCrNiCux (x = 0) high-entropy alloy coating has a single BCC phase structure and the Al0.7FeCoCrNiCux (x = 0.30, 0.60, 0.80, 1.00) high-entropy alloy coating consists of both BCC and FCC phases with a typical dendrite morphology. With the increase in Cu content, the self-corrosion potential of Al0.7FeCoCrNiCux gradually increases and the current density gradually decreases, which with the results of the electrochemical impedance spectrum analysis, indicating that the corrosion resistance of Al0.7FeCoCrNiCu1.00 is optimal. The results of the neutral salt spray acceleration test and the outdoor atmospheric exposure test were integrated to conduct a comprehensive evaluation of the corrosion resistance of the coating. The corrosion resistance of Al0.7FeCoCrNiCux coating increases with the increase in Cu content, and the impressive strength and plastic deformation are best when x = 0.80. Neutral salt spray accelerated the test with no corrosion at 5040 h, and even if the coating is broken, it can last up to 4320 h. In the outdoor atmospheric exposure test, which was conducted 12 months after the coating surface test, no corrosion occurred.

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Section: Xrd Diffraction Results and Analysis Of Coatingmentioning

confidence: 99%

Section: Xrd Diffraction Results and Analysis Of Coatingmentioning

confidence: 99%

Study on the Corrosion Resistance of Laser Clad Al0.7FeCoCrNiCux High-Entropy Alloy Coating in Marine Environment

Lü

2022

Coatings

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“…To address this issue, rare earth (RE) elements, which have high affinity toward O and impurities, can be used to prevent the oxidation of Hf. RE-doped W alloys possess notable characteristics, such as high-temperature strength and wear properties, and they demonstrate high performance in purifying the matrix and pinning the grain boundary [ 16 , 17 , 18 , 19 ].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and High-Temperature Ablation Behaviour of Hafnium-Doped Tungsten-Yttrium Alloys

Huang

Zhang

et al. 2023

Materials

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W is a widely used refractory metal with ultra-high melting point up to 3410 °C. However, its applications are limited by poor ablation resistance under high-temperature flame and air flow, which is crucial for aerospace vehicles. To improve the ablation resistance of W under extreme conditions, W-Y alloys doped with different Hf mass fractions (0, 10, 20, and 30) were prepared using the fast hot pressing sintering method. Microstructure and ablation behaviours at 2000 °C were investigated. Results showed that adding an appropriate amount of Hf improved the properties of the W-Y alloy evidently. In particular, the hardness of the alloy increased with the increased content of Hf. The formation of the HfO2 layer on the surface during ablation decreased the mass and linear ablation rates, indicating enhanced ablation resistance. However, excessive Hf addition will result in crack behaviour during ablation. With a Hf content of 20 wt.%, the alloy exhibited high stability and an excellent ablation resistance.

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Effect of Y2O3 Addition on the Microstructure, Wear Resistance, and Corrosion Behavior of W-4.9Ni-2.1Fe Heavy Alloy

Zhang

Zhu

Zhang

et al. 2019

J. of Materi Eng and Perform

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Microstructure and properties of W–4.9Ni–2.1Fe heavy alloy with Dy2O3 addition

Cited by 11 publications

References 23 publications

Study on the Corrosion Resistance of Laser Clad Al0.7FeCoCrNiCux High-Entropy Alloy Coating in Marine Environment

Study on the Corrosion Resistance of Laser Clad Al0.7FeCoCrNiCux High-Entropy Alloy Coating in Marine Environment

Microstructure and High-Temperature Ablation Behaviour of Hafnium-Doped Tungsten-Yttrium Alloys

Effect of Y2O3 Addition on the Microstructure, Wear Resistance, and Corrosion Behavior of W-4.9Ni-2.1Fe Heavy Alloy

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