Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 °C and Solution Immersion

Yu, Zhongfen; Liu, Li; Liu, Rui; Cao, Min; Fan, Lei; Liu, Ying; Geng, Shujiang; Wang, Fuhui

doi:10.3390/ma12091503

Cited by 8 publications

(3 citation statements)

References 44 publications

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“…The nickel-based superalloy GH4169 alloy has become a key material for aerospace applications due to its excellent comprehensive properties, and it is used to manufacture key components such as rocket engines and aeroengines [ 1 , 2 , 3 ]. The GH4169 alloy rings and thin-walled parts needed for manufacturing these components can exhibit a large deformation of residual stress due to uneven plastic deformation and temperature change during the hot working process, which will seriously reduce the dimensional accuracy of the parts, resulting in a large deviation between the size of the parts produced by hot working and the required size.…”

Section: Introductionmentioning

confidence: 99%

Effect of Tensile Deformation on Residual Stress of GH4169 Alloy

et al. 2021

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In order to reduce the residual stress of the GH4169 alloy, the effect and micro-mechanism of the tensile deformation were studied. The residual stress, dislocation density, and distribution of the GH4169 alloy were analyzed by X-ray residual stress tester, X-ray diffractometer (XRD), and electron backscatter diffraction (EBSD). The results show that: with the increase of tensile deformation, the residual stress relief first increases and then decreases. When the tensile deformation is 3%, the reduction rate of residual stress reaches the maximum, which is 90%. The mechanism of residual stress relief by the tensile treatment is that the dislocation group in the alloy is activated by tensile treatment, and the dislocation distribution in the alloy is more uniform by dislocation movement, multiplication, and annihilation so that the residual stress can be eliminated.

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Section: Introductionmentioning

confidence: 99%

Effect of Tensile Deformation on Residual Stress of GH4169 Alloy

et al. 2021

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“…Although the dense Cr 2 O 3 and Al 2 O 3 oxide film can prevent the diffusion of oxygen element, the oxygen element can continue to diffuse into the interior, due to the loose Nb 2 O 5 oxide film. Therefore, when the oxidation continues, NiO, Fe 2 O 3 and NiCr 2 O 4 oxides are formed [34]. It can be seen from Figure 9 that after the oxidation at 1100 • C for 110 h, in addition to maintaining part La 2 Zr 2 O 7 (JCPDS 01-073-0444) phase, oxides such as Cr 2 O 3 (JCPDS 00-038-1479), Nb 2 O 5 (JCPDS 00-015-0166), NiCr 2 O 4 (JCPDS 00-004-0763) and Fe 2 O 3 (JCPDS 01-076-1821) were formed on the coating surface.…”

Section: High Temperature Oxidation Propertiesmentioning

confidence: 99%

High Temperature Oxidation and Thermal Shock Properties of La2Zr2O7 Thermal Barrier Coatings Deposited on Nickel-Based Superalloy by Laser-Cladding

Huang

Pan

et al. 2020

Coatings

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In order to reduce the difficulty and cost of manufacturing and improve the high temperature oxidation and thermal shock properties of nickel-based superalloy, a thin La2Zr2O7 thermal barrier coating without bond coat was successfully prepared by laser-cladding using La2Zr2O7 powders on a nickel-based superalloy substrate. Scanning electron microscopy (SEM) and X-ray diffraction (XRD) methods were used to characterize the microstructure of the coating. The high temperature oxidation and thermal shock properties of the coating were evaluated by the air isothermal oxidation method at 1100 °C for 110 h and thermal cycling method at 25~1100 °C, respectively. The results show that the coating is mainly composed of La2Zr2O7 phase. The oxidation weight gain rate of the coating is about two-thirds of that of the substrate, and the first crack thermal shock lifetime of the coating is about 1.67 times of that of the substrate. The oxidation products of the coating are mainly Fe2O3, Cr2O3, NiCr2O4, Nb2O5 and La2Zr2O7. The existence of La2Zr2O7 phase in the coating is the main reason for the improvement of its oxidation resistance at 1100 °C and its thermal shock resistance at 25~1100 °C.

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“…As GH4169 Ni-based superalloy is a key material for the preparation of aero-engine hot end components, the improvement of its oxidation performance is crucial, and how to give full play to the active element effect of rare earths is the focus of the current research. At present, there are few studies on the high-temperature oxidation properties of GH4169 alloy alloyed with rare earth, and the oxidation temperature is mainly below 950 • C [25][26][27][28]. Therefore, it is necessary to investigate the effect of yttrium on the oxidation behavior of GH4169 Ni-based superalloy at extreme temperature (1000 • C) and its oxidation mechanism.…”

Section: Introductionmentioning

confidence: 99%

Effect of Yttrium Additions on the High-Temperature Oxidation Behavior of GH4169 Ni-Based Superalloy

Wang,

Liu,

Yang

et al. 2024

Materials

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The effect of the active element yttrium and its content on the oxidation behavior of GH4169 Ni-based superalloy at extreme temperature was studied by isothermal oxidation experiments. The results show that the oxide scale of GH4169 alloy presents a multi-layer structure, in which the continuous and dense Cr2O3 oxide layer is located in the subouter layer (II layer) and the continuous Nb-rich layer is in the subinner layer (III layer). These layers can inhibit the diffusion of oxygen and alloying elements, preventing the further oxidation of the alloy. The appropriate addition of yttrium can promote the selective oxidation of Cr element, reduce the thickness of the oxide scale and the oxidation rate of the alloy, inhibit the formation of voids at the interface of the oxide scale/alloy matrix, improve the resistance of the alloy to spalling as well as the adhesion of the oxide scale, and improve the high-temperature oxidation resistance of the alloy. Of those tested, the alloy containing 0.04 wt.%Y has the lowest oxidation weight gain, the slowest oxidation rate, and less oxide scale spalling. Based on this, the effect of yttrium on the high-temperature oxidation behavior of GH4169 Ni-based superalloy and its mechanism were revealed.

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Corrosion Behavior of GH4169 Alloy under Alternating Oxidation at 900 °C and Solution Immersion

Cited by 8 publications

References 44 publications

Effect of Tensile Deformation on Residual Stress of GH4169 Alloy

Effect of Tensile Deformation on Residual Stress of GH4169 Alloy

High Temperature Oxidation and Thermal Shock Properties of La2Zr2O7 Thermal Barrier Coatings Deposited on Nickel-Based Superalloy by Laser-Cladding

Effect of Yttrium Additions on the High-Temperature Oxidation Behavior of GH4169 Ni-Based Superalloy

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