Precipitation Behavior of the Topologically Close-Packed Phase in the DD5 Superalloy during Long-Term Aging

Liu, Guiqun; Zhang, Xiaoli; Wang, Xinyi; Qiao, Yanxin

doi:10.1155/2020/2569837

Cited by 4 publications

(2 citation statements)

References 23 publications

(25 reference statements)

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“…e elemental content of the dendrites in the C3 coating measured by EDS is listed in Figure 7. Only the contents of Fe, Cr, Ni, and Si were detected in the C3 coating because of the poor sensitivity of EDS in detecting light elements [13,33]. Compared with the original Ni45 powders, the content of element Si, Cr, and Ni changed less after the laser cladding process, but a remarkable increase in the Fe content was observed.…”

Section: Xrd and Eds Measurementsmentioning

confidence: 98%

Effects of Laser Scanning Speed on Microstructure, Microhardness, and Corrosion Behavior of Laser Cladding Ni45 Coatings

Qiao

Huang

et al. 2020

Journal of Chemistry

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The effects of laser scanning speed on the microstructure, microhardness, and corrosion behavior of Ni45 coatings were investigated by using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), microhardness, and electrochemical measurements. The results showed that increasing laser scanning speed promotes the transformation from planar crystals to dendrites and refines the grains concurrently. The γ-(Ni, Fe), FeNi3, and M23(C,B)6 are identified as the primary phase composition in the Ni45 coatings regardless of the laser scanning speed. Thereinto, the formation and growth of M23(C,B)6 precipitates can be inhibited with increasing laser scanning speed due to the higher cooling rate, which affects the microhardness distribution and corrosion resistance of the coating. On the one hand, the microhardness of the whole coating presents a downtrend with increasing laser scanning speed due to the reduction of M23(C,B)6 phase. On the other hand, the corrosion resistance in 0.5 M NaCl solution is improved to some extent at higher laser scanning speed because the less precipitation of M23(C,B)6 reduces the depletion of Cr around the precipitates. In contrast, all the coatings exhibit undifferentiated but poor corrosion resistance in the highly corrosive 0.5 M NaCl + 0.5 M H2SO4 solution.

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Section: Xrd and Eds Measurementsmentioning

confidence: 98%

Effects of Laser Scanning Speed on Microstructure, Microhardness, and Corrosion Behavior of Laser Cladding Ni45 Coatings

Qiao

Huang

et al. 2020

Journal of Chemistry

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“…It had been reported that the properties of the oxide films are closely related to the corrosion resistance [ 6 – 10 ]. The corrosion behaviors of nickel-based alloys in high-temperature water have been extensively studied [ 1 , 7 , 11 – 16 ]. The oxide film developed on nickel-based alloys generally presents a multilayer structure with Ni/Fe-rich outer layer and a chromium-rich inner layer [ 14 , 17 – 19 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Iron Ion on Corrosion Behavior of Inconel 625 in High-Temperature Water

et al. 2020

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The corrosion behavior of an ultralow iron nickel-based alloy Inconel 625 under high-temperature water has been evaluated. The results show that surface oxidation and pitting were the principal corrosion mechanisms of Inconel 625 during the initial immersion period. The surface layer of the oxide film is first Ni-enriched and then Fe-enriched as immersion time increases. The iron ions dissolved from the autoclave could lead to the formation of NiFe2O4 and have a great influence on the oxidation behavior of Inconel 625. The oxides nucleated by solid-state reactions with selective dissolution of Fe and Ni and then grew up through precipitation of cations from solution.

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Crystallographic texture and multiscale boundaries mediated creep anisotropy in additively manufactured Ni-based Hastelloy C276 superalloy

Qiu,

Zhu,

Wang

et al. 2024

Additive Manufacturing

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Precipitation Behavior of the Topologically Close-Packed Phase in the DD5 Superalloy during Long-Term Aging

Cited by 4 publications

References 23 publications

Effects of Laser Scanning Speed on Microstructure, Microhardness, and Corrosion Behavior of Laser Cladding Ni45 Coatings

Effects of Laser Scanning Speed on Microstructure, Microhardness, and Corrosion Behavior of Laser Cladding Ni45 Coatings

Effect of Iron Ion on Corrosion Behavior of Inconel 625 in High-Temperature Water

Crystallographic texture and multiscale boundaries mediated creep anisotropy in additively manufactured Ni-based Hastelloy C276 superalloy

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