Hot corrosion behavior of a NiCoCrAlY coating fabricated by laser cladding on 17-4PH stainless steel

Li, Yuxin; Yang, Yixin; Nie, Jinhao; Bai, Peikang; Liu, Zhiguo; Wei, Shouzheng; Cai, Jie; Guan, Qingfeng

doi:10.1016/j.engfailanal.2021.105962

Cited by 10 publications

(2 citation statements)

References 35 publications

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“…The presence of NaCl particles in humid air can easily deposit on the surface of these components, accelerating the process of hot corrosion [4][5][6]. In order to mitigate or prevent hot corrosion, the preparation of protective coatings on the surface of materials is a highly economical and universally applicable method [7][8][9][10]. Currently, most researchers have aimed to investigate the hot corrosion resistance of MCrAlY (M = Fe, Ni, Co, and Pt) coatings [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Thermal Stability and Hot Corrosion Performance of the AlCoCrFeNi2.1 High-Entropy Alloy Coating by Laser Cladding

Zhang,

Ji,

Yang

2023

Materials

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Both crack-free AlCoCrFeNi2.1 eutectic high-entropy alloy (EHEA) and Y and Hf co-doping AlCoCrFeNi2.1 EHEA (YHf-EHEA) coatings were prepared by laser cladding. The solidification microstructure, thermal stability, and hot corrosion performance of the coatings at 900 °C under 75% Na2SO4 + 25% NaCl molten salts were investigated. The experimental results showed that the structure of the as-deposited coatings consisted of FCC and BCC/B2 phases. After heat treatment, an Al-rich L12 phase was precipitated in the FCC phase of all coatings. The grain sizes of the EHEA and YHf-EHEA coatings after heat treatment at 900 °C for 10 h increased by 27.5% and 15.7%, respectively, compared to the as-deposited coatings. Meanwhile, after hot corrosion, the spallation areas of the YHf-EHEA and EHEA coatings accounted for 14.98% and 5.67% of the total surface area, respectively. In this study, the Y and Hf co-doping did not change the microstructure morphology and phase structure of the coatings but did improve the thermal stability and resistance of the hot corrosion oxide scale spallation, providing a certain amount of data and theoretical support for the application of EHEA coatings as high-temperature protective coatings.

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Section: Introductionmentioning

confidence: 99%

Thermal Stability and Hot Corrosion Performance of the AlCoCrFeNi2.1 High-Entropy Alloy Coating by Laser Cladding

Zhang,

Ji,

Yang

2023

Materials

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“…For example, technologies such as plasma spraying, 4) electron beam physical vapor deposition, 5) arc ion plating, 6) and laser cladding. 7) Among them, laser cladding technology is widely used due to its obvious advantages, such as high efficiency, low dilution, no pollution, and metallurgical bonding of coating and substrate. 8) In particular, laser melting can replace some solid alloy parts by covering an expensive layer of alloy powder with an inexpensive metal surface, saving resources and costs.…”

Section: Introductionmentioning

confidence: 99%

Evolution of Microstructure and Mechanical Properties of NiCoCrAlY Coatings After High-Current Pulsed Electron Beam Irradiation

Tian

Chen

et al. 2023

Mater. Trans.

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In this paper, the NiCoCrAlY coating prepared by laser cladding was modified by a high-current pulsed electron beam technique. Scanning electron microscopy and X-ray diffraction analysis were used to characterize the microstructure and composition of the coatings before and after irradiation, and then the changes in mechanical properties were revealed by comparing the hardness and friction properties of the two coatings. The results showed that the pulsed irradiation purified the coating surface, formed an evaporative recondensation layer and a plastic deformation layer, and produced a dense remelting layer with a thickness of 34 µm. The remelted layer led to an increase in the hardness of the irradiated coating and a decrease in the friction coefficient and wear. The pulsed irradiation effectively improved the mechanical properties of the coatings.

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Rapid Surface Hardening of Stainless Steel by Plasma Electrolytic Carburizing

Song

Liu

Fang

et al. 2022

J. of Materi Eng and Perform

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Hot corrosion behavior of a NiCoCrAlY coating fabricated by laser cladding on 17-4PH stainless steel

Cited by 10 publications

References 35 publications

Thermal Stability and Hot Corrosion Performance of the AlCoCrFeNi2.1 High-Entropy Alloy Coating by Laser Cladding

Thermal Stability and Hot Corrosion Performance of the AlCoCrFeNi2.1 High-Entropy Alloy Coating by Laser Cladding

Evolution of Microstructure and Mechanical Properties of NiCoCrAlY Coatings After High-Current Pulsed Electron Beam Irradiation

Rapid Surface Hardening of Stainless Steel by Plasma Electrolytic Carburizing

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